310 SECTIONAL TRANSACTIONS.— B, 



January 15, 1931. During the lifetime of the Act, British dye manufacti rers have 

 continued to make commendable progress, and the author compares their productive 

 capacity with those of their rivals in the other principal dye making countries. The 

 speaker deduces from these recent developments certain inferences which should 

 influence Governmental action in the immediate future. 



Prof. J. F. Thorpe, F.R.S., President of the Chemical Society, and Member of the 

 DyestufEs Industry Development Committee, refers to the marked progress in dye- 

 stuff production during the last ten years and to the beneficial effect of the Dyestufis 

 Act on this development. He instances several important technical and scientific 

 problems which still remain to be solved. Changes in modes and fashions must be 

 expected ; the introduction of artificial textile fibres is in itself a revolution. Dyes 

 in considerable vogue at present will be obsolete in a few years, and to meet these 

 inevitable changes strong and well-equipped schools of organic research are required 

 in close touch with a progressive industry capable of making use of trained chemists 

 not only in dye production but in all other branches of the fine chemical industry. 



Mr. Tom Taylor, a member of the Licensing and Development Committees 

 appointed under the Act, discusses the manufacture of lake pigments as an important 

 addition to the production of dyestuffs. During the last seven years importation of 

 lake colours has almost ceased, thus enabling the British lake makers to establish aft 

 important trade to the advantage of the lake consuming industries. The production 

 of British-made printing ink is now three times greater than it was in 1913, and the 

 total output of British lake colours is ten times that of the same year. This improved 

 position the speaker attributes almost entirely to the Act. 



Among the subsequent speakers representing the scientific side of the chemistry 

 of colouring matters are Sir William Pope, Prof. Armstrong and the President of the 

 Section, and on the technical and manufacturing side Messrs. C. J. T. Cronshaw and 

 J. Rogers of the Imperial Chemical Industries and Mr. J. Morton (Scottish Dyes, 

 Limited). 



The discussion is summed up by Mr. W. J. U. Woolcock, Chairman of the Dye- 

 stuffs Industry Development Committee. 



Afternoon. 

 Visit to The Broad Plain Soap Works, Bristol. 



Monday, September 8. 

 Discussion on Chemotherapy. — 



(a) Dr. F. L. Pyman, F.E..S. — Antimalarials and Antiseptics. 



(b) Dr. T. A. Henry. — Derivatives of Quitenine. 



(c) Prof. R. Robinson, F.R.S. — New Antimalarials. 



(d) Dr. H. King. — Mechanism of the Action of Arsenicals. 



(e) Dr. Jessie Stewart. — New Arsenicals and Antimonials. 



(/) Prof. G. T. Morgan, F.R.S. — The Composition of the Antimony/ 

 Analogue of Tryparsamide. 



(g) Prof. C. S. Gibson. — Recent Investigations of Heterocyclic and 

 Homocyclic Arsenicals. 



(h) Prof. G. Barger, F.R.S. — The Action of Chemical Substances on 

 Teredo. 



Prof. E. C. C. Baly, C.B.B., Y.R.S.— Further Studies of Photosynthesis of 

 Carbohydrates. 



As has already been described, the photosynthesis of carbohydrates can be 

 achieved by the irradiation of carbonic acid adsorbed on a suitable surface in the 



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