Corpus of Modern Scottish Writing (CMSW) - www.scottishcorpus.ac.uk/cmsw/ Document : 652 Title: The Alchemist magazine, Vol. 1.1 Author(s): Various The Alchemist Vol. 1. No. 1. NOVEMBER, 1925 To Get the Best Service for PHOTOGRAPHY WIRELESS GRAMOPHONES Or SIGHT TESTING Expert Assistants in each Department. Go to BLACKADDER 107 Union Street, GLASGOW, C.1. Phone : 5970 Central Telegrams: "Snapshots," Glasgow OPEN SATURDAY till 6.30 p.m. The Alchemist. The Official Organ of the Glasgow University Alchemists' Club. Editor C. BUCHANAN, B.Sc., Ph.D. Sub-Editors JOHN McLINTOCK, B.Sc. WM. McNAB, M.A., B.Sc. Business Manager JAMES FRASER. VOL. I. No. i. Issued Monthly. NOVEMBER, 1925. Editorial. In introducing this, the first number of "The Alchemist," a few words of explanation are doubtless desirable. Its appearance is due to the remarkable growth, during the past few years, of the Glasgow University Alchemists' Club, particularly in the quality of its syllabus. The addresses delivered before it unquestionably merit a more permanent record than that carried away from a meeting by the average member, who hears and enjoys a lecture, forgets it, then wishes he had taken notes. But the taking of notes is an abomination; the lecturer is perceived as a voice only — a voice that awakens only annoyance, as it leaves the scribe well in the rear, developing writers' cramp, missing any real appreciation of the speaker's personality, and not even understanding the subject dealt with. A solution of this difficulty, by the publication of Transactions, was suggested at the last Annual General Meeting of the Club. The Council have decided that such a scheme is possible; hence this volume. Each issue will contain reports of the meetings of the club, and, when it is thought desirable, practically verbatim reports will be given. While the main feature of "The Alchemist" will always be the reports of club meetings, it is intended to make it a Club Magazine, in which will appear articles submitted by members on anything that will interest or amuse. The success of such a venture depends on the co-operation of all, and, as everything that the club has so far attempted has prospered, we do not anticipate failure. How then can the members help? Of course they can obviously do so by becoming regular subscribers, but, what is more important, they can help by sending in contributions for our succeeding issues. You can do something! If you have never written anything before you don't know whether you can write or not; try now in prose or verse. At the very least send a short par. about anything amusing you notice at meetings or in the laboratories, or send criticisms or suggestions. We will be glad also to hear news of general interest, regarding former-student members. Contributions should be handed to any of the Committee, or sent to the Editor at the Organic Chemistry Department. It is intended to publish five monthly issues during the winter session, about the 16th of each month. Our next issue will contain the Address by Dr. F. W. Aston on "Isotopes." Charles Macintosh. By Prof. G. G. Henderson. Address delivered 28th October, 1925 (Abridged) Some few months ago I was asked by the Director of the Rubber Research Association if I could give him any information with respect to a Glasgow chemist who was very prominent some hundred years ago, and whose name is literally a household word, Charles Macintosh, who invented the process of waterproofing fabrics. On looking into a memoir written by his son, I was much surprised to find that, quite apart from his discovery of the waterproofing process, Charles Macintosh had been extremely prominent in starting and developing quite a number of those chemical industries which have largely contributed to make Glasgow what it is, and it occurred to me that it might be perhaps of interest if I endeavoured to give a very brief outline of some of his principal achievements, chiefly as an industrial chemist. Charles Macintosh was born in Glasgow in the year 1766, and died in the year 1843, in his 77th year. Like most people, I confess myself to be a believer in heredity, and for that reason it is interesting to note that Macintosh's father, George Macintosh, was the fourth son of a farmer in Ross-shire, and naturally had to make his own way in the world. As a very young man. he obtained a position as a clerk with a firm known as the "Glasgow Tan Work Co."; in the year 1773 he started a similar business on his own account. and soon had 500 people occupied. A few years afterwards, he started another industry, the manufacture of a dye-stuff known in these days as "cudbear," and, in the year 1785, this enterprising man entered into partnership with David Dale, and established a Turkey-red dyework at Dalmarnock, which is said to be the first established in Britain. Macintosh also had an interest in the herring industry, and was the principal owner of two East Indiamen. He further was greatly interested in recruiting matters, and did a great deal in enlisting recruits for Highland regiments. He was Chairman of the Glasgow Chamber of Commerce. Charles Macintosh's mother was the aunt of General Sir John Moore, and it is rather an interesting fact to notice from the correspondence that Sir John Moore was a very intimate friend of his cousin, Charles Macintosh. Charles Macintosh was sent to the Grammar School in Glasgow and there he became quite proficient in Latin. He was next sent to a boarding-school in Yorkshire, and after his school education had been completed, came back to Glasgow to the office of a friend, to learn business methods. He must, however, have, even at this comparatively early age, shown a very distinct taste for chemistry, because there is no doubt he studied chemistry for some time, under Joseph Black at Edinburgh, and, it appears also, under Irvine, Black's successor, in Glasgow. After a short period of clerical work, Macintosh, before he was 20, started as a chemical manufacturer. He embarked on the manufacture of sal ammoniac in partnership with his father, and with William Couper, a very eminent surgeon in Glasgow; but, in 1792, this business was given up. In 1786 he visited Holland, Belgium and France, and had the opportunity of seeing a factory in which sugar of lead was manufactured. He was struck with the fact that the starting products were imported from Britain, and further, when the sugar of lead was brought back to Britain, duty of 3d. per lb. had to be paid, so that, on his return home, he decided that he would start the manufacture of sugar of lead. This industry proved very successful. Here it is rather interesting to note that Macintosh recognised that there was more than one acetate of lead, but he had not, of course, reached the stage of recognising the existence of basic salts. He also started at this time another industry, the manufacture of "red liquor" — a solution of aluminium acetate — which also proved very successful. We now come to a very interesting point in his career. At that time the bleaching properties of chlorine in presence of water were known, and Berthollet had suggested that chlorine water might very profitably be used for bleaching purposes. The smell of the gas, if nothing else, was a great objection to using chlorine as a bleaching agent, and various attempts were made to improve the process. A very great advance was made when the procedure of mixing water with quicklime and passing in a current of chlorine was adopted. This preparation of a solution of bleaching powder was devised by Charles Tennant, and it is generally believed that Tennant first made bleaching powder ; but, if the statements made by Macintosh himself and never contradicted, are correct, it was Charles Macintosh who, in 1799, being at that time a partner of Charles Tennant, prepared, for the first time, chloride of lime or bleaching powder, in the dry state. Just about this time, Macintosh was chiefly instrumental in opening a work, the first of its kind in Scotland, for the manufacture of alum, at Hurlet, near Paisley ; and, while managing similar works at Campsie, Macintosh invented a surface evaporating reverberatory furnace for the concentration of the liquors. At the alum work at Campsie, Macintosh first established in Scotland the manufacture of prussian blue and of the yellow prussiate of potassium, and also showed the dyers how they could use the latter in printing fabrics. Here is another interesting attempt at manufacturing by Macintosh which was not successful, for rather a curious reason. In the year 1809 he established a factory for the production of pure yeast in London, at the invitation of the master bakers there. Operations were carried out on a very considerable scale, and the brewers found that much of the yeast they produced, and for which they got a considerable price, was left on their hands, and if the Encyclopaedia Brittanica can be trusted, the following is an official statement. "Accordingly, they, the brewers, invited journeymen bakers to their cellars, gave them their full of ale, and promised to regale them in like manner every day, provided they would force their masters to take all their yeast from them. The journeymen declared in a body that they would work no more unless the masters gave up taking any more yeast from the new factory, and so the factory was closed." Now, the most notable achievement of Macintosh was the invention of the waterproofing of fabrics, and, curiously enough, that arose from a development of the manufacture of coal gas. After the introduction of coal gas into Britain, the manufacturers found that the tar and other liquid products resulting from the process accumulated on their hands "in the shape of a most disagreeable and inconvenient nuisance." In London, these products were thrown into the Thames, in Edinburgh, into the Forth, and in Glasgow they were buried in quarries and coal pits. It seems to us now rather a dreadful thing that they threw away the ammoniacal liquor and the tar. But have we any right to criticise? We know the value of ammonia and coal tar and the products we get from coal tar, and we commit the criminal folly of throwing away enormous quantities of these products because we persist in burning coal in open fires and furnaces which enshroud our villages and cities in a pall of smoke, and prevent a large percentage of the sun's rays, which are not very abundant in this country, from penetrating. It soon became evident that the manufacture of gas would be checked unless some more economical way of disposing of the tar was devised, and here again our enterprising manufacturer, Charles Macintosh, plays a part. In 1819 he contracted with the proprietors of the Glasgow works to receive for a term of years their output of tar and ammoniacal liquor. The ammonia recovered from the liquor he used for the manufacture of cudbear. The tar was distilled because the demand for the pitch was great, and it occurred to Macintosh that he might use the naphtha if it would prove to be a solvent of rubber. On examination, he found that he could dissolve his rubber with this naphtha and by evaporation of this solution he could obtain flexible waterproof varnish. He wanted to obtain a solvent for rubber which could be evaporated, leaving rubber as a flexible cement between two layers of vapour, thus rendering the fabric waterproof — and airproof also. In the year 1822 he obtained a patent for his process, and established a factory for waterproof articles in Glasgow, and later in Manchester. Before very long his patent was infringed, but his claim was fully established in the courts. Among Macintosh's other achievements are his inventions of a method of burning coal tar as a fuel in furnaces, and of an improvement in the old method of making steel. He was also very much interested in the development of the Hot Blast process, which revolutionised the manufacture of iron in this country. James Beaumont Neilson had taken out a 'patent for this process, and Charles Macintosh, along with others, became co-patentee with Neilson, and appears to have had a great deal to do with perfecting and introducing the invention. Although Charles Macintosh's energies were directed almost exclusively to technical work, he must have been a very able chemist, and evidently was recognised as such by his contemporaries. We find from his correspondence that he was on intimate terms with such men as Smithson Tennant, the Professor at Cambridge, and with Wollaston, the President of the Royal Society. He was a correspondent of Dalton, Berzelius, and Sir Humphrey Davy. When he made a visit to Paris in 1815, he was received with the utmost cordiality by the scientific men there at that time, among others, Gay Lussac, Vauquelin, and Thénard. He must have had a very considerable reputation as a scientific man, quite apart from his record as a manufacturer, because, in the year 1823 he was admitted to the Fellowship of the Royal. Society. I think, from the very brief and imperfect sketch which I have put before you, you will admit that Charles Macintosh, a Glasgow man born, was a chemist of whom his native city may justly feel proud. I gather from the J. C. S. That Ingold's views are in a mess. (I hope you're not offended when I criticise distinguished men). Of recent years his Imine Rings Have been the very latest things To make us wonder what he means. Now Lapworth comes with plus and minus Diagrams — to undermine us — And slyly hints at amidines. Which, as he shews, are quite distinct From compounds which have both ends linked. D. T. Our Department Guyed. (Being a few notes, geographical, historical and anthropological, concerning the Chemistry Department of Glasgow University, by one who knows it too well.) The study of chemistry in the University was inaugurated in the year 1741, when Bishop Turnbull removed his famous Papal Bull to more commodious and comfortable buildings, and bequeathed its former byre for the purpose of setting up (as the ancient document puts it) 'ane or twa studia chemica.' Round this original building other sheds have sprung up, mushroom-like, during the last hundred years, until at the present moment we have the most glorious example extant of the Neo-Zeppelin-Hanger-Salvation-Army-Hut-type of architecture known in this country. (A prize is offered this month for the nearest guess to which laboratory was the original Papal Bull Byre. — Editor). In the Organic Chemistry Section the only architectural feature is the doorway, which has twelve keys, owned by the twelve chosen ones of the Department. Down the dungeon stairs to your right, there are, according to the stories of a few foolhardy adventurers, two laboratories, in which can be seen at several sinks the motionless forms of men. Some have mistaken these figures for plumbers at work, although, in reality, they are nothing short of research students in similar states of physical exaltation. In this place also, there is on view the most celebrated and magnificent collection of beakers ever held in the possession of any chemist of the University. The hours for inspection when the owner can personally conduct you round his glassware museum are 9 a.m. to 6 p.m. (except Sundays). The notice board at the top of these stairs is worthy of your attention. On it in time the announcement will be made that 96 is your handicap in the Golf Tournament, and 23 your score in the first Class Exam. It also contains notices regarding prizes to be won by students for original research in chemistry. In this connection we would point out that the action of half-a-pound of sodium on a sinkful of water has already been fully investigated. The store on your left is where all 175 per cent. yields of organic preparations come from. It also contains a species of animal of the genus Lab-boy which hibernates there during these present months, but will come out to feed at Christmas time. The other Section of the Department — labelled the Inorganic Side — merits no mention except for one interesting feature. It contains a fearsome ogre who lives in a cave with more chemical riches than Mr. Baird, or his trusty crony, Mr. Tatlock, ever commanded. Occasionally, daring students enter that cave and demand certain of these possessions of the ogre. But the ogre only grows wild, and declares, "I ain't got none." Innocent fresher, if such ever be your experience, never dare confute these words of the ogre, for tradition has it that a man who once did that was taken into the cave and distilled in vacuô until nothing was left in the flask but his false teeth and a hairpin that was doing duty as trouser button for the day. So beware! we say. May your condenser never leak! Señor Ville. CHEMICAL BOOKS We carry a large Stock of Books in every Branch of CHEMISTRY and the Allied Sciences. CHEMICAL APPARATUS Approved sets of apparatus INORGANIC and ORGANIC at lowest Prices. JOHN SMITH & SON (GLASGOW) Ltd. University Booksellers 10 UNIVERSITY AVENUE AND 26=30 GIBSON STREET, : HILLHEAD Chemical. Laboratory Materials. GLASSWARE, FILTER PAPERS, CHEMICALS, PORCELAIN WARE & SILICA WARE . . We Specialise in Students' Requirements McQUILKIN & CO. Opticians and Laboratory Furnishers 17 SAUCHIEHALL ST., GLASGOW. Research. The ultimate ambition of all young chemists is to become research workers. This is one of these subtle instincts that defy analysis, like the early desire of every healthy boy to keep white mice. One can only accept the fact as it stands, and offer a few remarks in foretaste of the delectations that await the neophyte. There are three great essentials to research work of any kind: — plentiful supplies of patience, tobacco, and acetone. Patience preserves the worker's sanity in the periods that divide the instalments of his 'grant' (if any): tobacco gives him some little interest in life between meal times: and the acetone serves to clean his pipe. Equipped with these, plus a little sugar, some tea, a beaker and a Bunsen burner, none need fear the rigours of a life devoted to science. It is, in many ways, a hard life. Sometimes there isn't a stool to be found in the department, and the worker is forced to sleep on his feet like a horse: sometimes a lab-boy of more than usually criminal tendencies forgets to buy more biscuits when the old supply runs out. And even greater dangers abound. Alcohol is risky stuff at any time: and a flask of ether has positively lethal properties when used as a receptacle for cigarette ends. Yet such things are the daily trials of all who set out along the darksome road that leads to the 'tea-club' and the doctorate. There are, of course, attendant compensations. For instance, research men never need to bother about their yields: such low delights are reserved for first-year students. Big yields in research are as much out of place as red noses in the clergy, or geniality in storekeepers, and only create needless embarrassment in those who come across them. Again, when a solution does not crystallise — and research solutions seldom do — the worker does not worry. He labels it, dates it, and stands it aside among his dirty apparatus, then leaves the rest to the cleaners. If, by any chance, the latter overlook it, he may, after some months, re-discover it behind the radiator or in a fume-cupboard ; and many of his most interesting results accrue from such masterly inactivity. He sets aside a chloro-body in acetic acid solution — and it may in time produce any old thing from rubber-tubing to inanimate 'blue-bottles.' Should a crystalline substance be obtained, it is carefully transferred to porous plate, and thrown out of the window — lest any spiteful person should inquire as to its constitution. Research is above results. But the greatest of all rewards to him who sticks so nobly to his bench is the feeling that his life is devoted to the common service of his fellows and the forward progress of humanity. Many a research man, after a long day's toil in an atmosphere of carbon di-sulphide and benzoyl chloride, has seen strange twitchings in the faces of those around him in his tram-car or his home, and watched unbidden tears come to their eyes who regard him as one far above and beyond them — as one who could not be far enough away. I. O. Dean. Lochnagar — A Rectorial Ballad. Oh, Young Lochnagar is come out of the West, There was fish on his trousers and egg on his vest; And save a black eye and a very bad smell, He came out unhurt from that filthy pell-mell. For he'd used with effect some H two SO four, Oh, a very fine chemist was young Lochnagar. Oh, boldly he entered a Chemistry Lab. And he looked around for fresh acid to "nab," But up spake a Prof. in a very loud voice "You must stay here and work, or be failed — take your choice. For if you don't do melting points by the score I shall plough you next June, O Young Lochnagar." Then Young Lochnagar he covered his face With his two grimy hands, and he thought for a space, Then he drew from a sticky hip-pocket an egg, And he washed it with benzine and thus humbly did beg: — "Of eggs, dear Professor, I have quite a store, Take this as a present from Young Lochnagar." The Prof.'s heart was softened ('twas just like his head), So he thanked Lochnagar for the compliment paid; And he took the egg home and he brewed a mess, But was o'ercome by the fumes of impure H2S. Oh, he fumed, and he raved, and he cursed, and he swore, And he vowed he'd have vengeance on Young Lochnagar. There and then in the Lab. a great bustle was seen, The Prof. brewed ten gallons of car-bylamine; And he filled thirty sacks with potash cyanide, And he saddled his horse and away he did ride. But he scoured the countryside many times o'er Without e'en a scent of Young Lochnagar. Meta. "Lux in Tenebris." By Wm. McNab, M.A., B.Sc. Presidential Address delivered 4th November, 1925 (Abridged). In 1606 Newton skewed the composite nature of white light. The first question which arose following this was as to the exact nature of light. The emission theory of Newton was soon challenged by Young in his theory of propagation by wave motion. The wave theory ultimately displaced the emission theory, but was modified somewhat. The first wave theory premised an ether, but the objections to this were many, and finally we were given the electromagnetic theory of Maxwell. Sir William Herschel, experimenting with the spectrum, was not content with the actual colours, but placed a thermometer in front of each band. He found a definite increase in temperature due to the light, and this rise varied progressively along the spectrum. Ritter and Wollaston (1801) showed that beyond the violet were rays which acted upon silver chloride chemically. Young was the first to put a numerical value on the wave-length of the visible spectrum. Newton had fancied there was an analogy between the spectrum and an octave of music. Hence, the name octave was given to the range of the visible spectrum. It will be seen that the visible octave only occupies a very small part of the "Keyboard of the Electric Wave Organ." The ultra-violet accounts for about two octaves. X-rays and Gamma rays occupy octaves higher than the ultra-violet. The octaves below the infra-red are taken up by Heat Waves, and the long Hertzian and Wireless waves. The effect of light on chemical reaction was not studied to any degree until the last 10 or 20 years. In our everyday life also, we are apt to neglect light in biological studies. Let me start on the biological side. In the past, Pagan tribes worshipped the sun as a god, and in 400 B.C. we find the Greeks being treated for various ills in the Temple of Aesculapius, son of Phoebus Apollo, god of the sun. The 18th century saw a revival of sun treatment which was continued into the next century and up to the present time. The first name of importance is that of Niels Finsen, who invented a source of artificial sunlight. In 1903 there was opened at Leysin the first clinic for treating by sunlight, tuberculosis. Rollier in 1920 opened his "Ecole au Soleil," in which children predisposed to tuberculosis were taught, rather than in cities, where the power of sunlight was lost. Rollier is now the recognised authority on heliotherapy. The maximum success of sun treatment has been attained in cases of rickets, lupus, and tuberculosis, but much remains to be done on the chemical side of the process. As regards the scientific basis of heliotherapy: — It was known in 1700 that light had a bactericidal action. Is this effect brought about by light or accompanying heat? Downes and Blunt carried out experiments (Proc. Roy. Soc., Dec. 1877) and two points were settled. (1) that light was the active agent, and (2) the light acted directly on the germs. The next question was whether the action of light was a selective effect, and, if so, which part of the spectrum was the most effective. Agreement was reached with regard to the bactericidal effect of the ultra-violet rays. One of the chief properties of ultra-violet rays is that they are absorbed by ordinary glass. Obviously, therefore, a sedentary life means a life away from the energy-supplying portions of sunlight. Moreover, all of the short ultra-violet waves are absorbed before the sun's rays reach the land surface. It would be thought, then, that waves of still shorter length could be registered at high levels, and this was actually found. Thoroughly appreciating the facts, firstly, that the beneficial effects of sunlight are clue to ultra-violet rays, and secondly, that these are more abundant at high altitudes, Rollier commenced treating his patients in the Alps at Leysin. What results have been obtained in the health-giving Alpine sunlight rays? Daily, cases of rickets, tuberculosis, etc. are being cured, and wonderful work is being done in. protection against tuberculosis. But however admirable the conditions in mountainous regions are for sanatoria, there is the disadvantage of inaccessi-bility. It is here that artificial sources of ultra-violet rays come into play. Many such sources have been found which give spectra extending far into the ultra-violet. Of these, the best known are the Tungsten arc, the carbon arc, the mercury vapour arc, and the Westminster arc. Much harm may be caused by the wanton use of artificial sunlight, and herein lies a large field of research for the physical chemist. If such waves of short length are dangerous, then appropriate filters must be devised such that the filtered rays will give just the same effect as natural sunlight. Regarding the physiological effects of sunlight, artificial or real, we all know the signs of holidays. Well-tanned faces are the most prominent after-effects. This is due to pigmentation, and in particular to the development of melanin. Various explanations have been advanced for this. How far will rays of different length pentrate the skin? By using different arcs and different absorbents it is found that no rays shorter than 2320 A.U. or longer than 3300 A. U. will produce erythema. The following, then, is a possible explanation of pigmentation. Certain rays of ultra-violet penetrate into the epidermis and activate melanophores containing melanogen, which last produces melanin by photodynamic action. With continued irradiation, therefore involving a continuous elaboration of melanin, a time will come when a layer of skin is mapped out through which ultra violet is no longer able to penetrate, since melanin absorbs ultra violet rays. What is meant by photodynamic action? If a series of waves synchronises with the natural period of a planetary electron, then that electron may be ejected altogether from the field of the nucleus with the result that chemical change will ensue. It is far from this idea to the formation of melanin from melanogen, but it is a novel basis on which to work out the action of light. The idea also helps us to understand the mechanism of the selenium cell. Now, true ionisation, i.e., loss of an electron, on a metal by illumination by ultra-violet light is nullified by the interposition, between the source of light and the metal, of ordinary glass. Ionisation therefore, is an effect of ultraviolet waves. It may be of interest now to mention one of the suggested methods by which living cells are destroyed by ultraviolet rays. Fats, proteins, etc., are present in the form of colloids. Imagine the effect of ultra-violet on the charged colloid particles. The excess charges will be split off, and therefore granulation will appear in the cellular substance, due to precipitation of the colloid matter in the molecular state. This actually happens. Hess and Weinstock discovered that irradiated cotton-seed oil, when fed to rats which were on a rickets-producing diet, prevented the development of rickets. Control rats receiving no oil and others receiving non-irradiated oil developed rickets. They also found that antirachitic properties could be conferred on wheat subjected to irradiation for a period every day. Likewise, they shewed that the efficacy of plants for preventing rickets was not dependent on the chlorophyll content. Attempts were made to isolate the potent ingredient of irradiated substances. Eventually, it was found that phytosterol, when irradiated and fed to rats on a rickets-producing diet, prevented the appearance of rickets. The non-irradiated compound had no such effect. Similar results were obtained with cholesterol. The explanation offered is to the effect that the ultra-violet activates the cholesterol present in the skin, to produce antirachitic effects. Further work has been done on the chemistry of the reaction. Baly and Heildron have performed interesting experiments on the photosynthesis of sugars. By bubbling carbon dioxide through water in a quartz cell (which permits of the passage of ultra-violet light) these workers found very definite proof of the formation of formaldehyde. When glass replaced the quartz, i.e., when ultraviolet was cut off, no formaldehyde was formed. They have also proved that light will polymerise formaldehyde in aqueous solution to reducing sugars. The two steps of the synthesis of sugar in the same vessel at the same time was next accomplished by liberating the carbon dioxide in presence of the water, e.g., by irradiating a solution of oxalic acid. These results seem perfectly convincing, but a difficulty arose. Why were plants able to grow in hot-houses when the rays necessary for the first stage of the synthesis could not penetrate the glass? A theory was put forward which postulated some substance in the plant which was capable of absorbing light of lower frequency and radiating that energy in infra-red frequency characteristic of carbon dioxide and water. Actual experimental proof of this view has been obtained. HOLMES for BOOKS Publications of Interest Isotopes By F. W. Aston 10/6 Chemistry in Service of Man By A. Findlay 6/- Light and Colour By R. A. Houston 7/6 Chemists Year Book By F. W. Atack 21/- Mail Orders receive prompt attention W. R. HOLMES New and Second-Hand Booksellers 3-11 Dunlop Street Branch & Second-Hand Branch at 87 Queen Street, Glasgow Browse around and see what we have Great Selection of 1/6 & 2/- Fiction Ideal House for all Social Functions Tea Rooms Lunch Rooms Grill Room Quick Service Rooms (Ladies and Gentlemen) Banqueting Hall Ball Rooms Telephone - 6314 Central. (4 Lines)