SECTIONAL TRANSACTIONS.— 1. 391 



(a) Opener: Prof. J. C. Drummond. 



{b) Capt. John Golding, D.S.O. — An Estimation of the Prac- 

 tical Agricultural Impoi lance of Vilamin A in Feeding Pigs. 



(c) Dr. A. Seidell. — FurtJier Studies on the Isolation of the Anti- 

 neuritic Vitamins. 



By means of a relatively simple process, a stable, semi-solid extract of highly 

 active vitamin has been obtained from fresh brewer's yeast. This has been 

 used for fractionation experiments with silver nitrate and ammoniacal silver 

 nitrate as precipitating agents. The distribution of the active vitamin in tlie 

 several fractions has been followed by means of feeding experiments on pigeons. 

 The activity and general character of the several precipitates have been 

 determined. 



8. Prof. W. Stoem van Leeuwen. — Experirnental Studies on Hyper- 



sensitiveness. 



The action of drugs on isolated organs in Tyrode Solution is an instance 

 of hypersensitiveness, since the drugs are not inhibited by blood constituents. 



Drug action can be augmented by substances which have no stimulating 

 action /jer se. 



These principles suffice to explain hypersensitiveness to drugs in man. 



(«) Blood of cases of hypersensitiveness to aspii'ine shows diminished fixation 

 of aspirine. 



(6) Aspirine, uric acid, oleic acid, and similar substances augment drug 

 action. 



(c) Aspirine heightens sensitiveness of guinea-pigs to anaphylactic shock. 



Conclusion : — Hypersensitiveness to drugs is due to {a) lack of fixing power of 

 blood for the drug; (b) augmentor action in allergic Teactions. 



This explains why the symptoms of hypersensitiveness to different drugs 

 show little differentiation. 



9. Prof. W. Storm van Leeuwen. — A Contribution to the Cause 



and Treatment of Bronchial Asthma, Hay Fever, and Allied 

 Conditions. 



In asthma, hay-fever, and allied conditions an allergic disposition exists 

 with following characteristics : — 



(a) Skin reactions with several proteins ; hypersensitiveness to one protein 

 is exceptional (no hypersensitiveness of skin to various sera, casein, peptone, 

 histamine; (b) ' crise colloidoclasique ' ; (c) blood extracts contain poison 

 stimulating smooth musculature (relation with uric acid metabolism) ; 

 (d) hypersensitiveness to tuberculin (relation between a and d). 



Treatment — ^Specific treatment often impossible. The author's treatment : — 

 (a) tuberculin in low doses; lb) regulation of diet. In addition to that, specific 

 treatment peptonetherapy (Auld) vaccine, etc. Author's results : 52 per cent, 

 cured, 38 per cent, improved, 10 per cent, failures. 



10. Mr. J. Barcroft, F.R.S. — Lecture on The Recent Expedition 



to the Andes for the Study of the Physiology of High Altitudes. 



Monday, September 11. 



11. Joint Discussion with Section A on Physical Instriwients for 



Biological Purposes. (See p. 353.) 



12. Dr. F. W. Edridge-Green, C.B.E. — Colour-Vision Theories in 



Relation to Colour -Blindness. 



Whilst many colour-vision theories explain equally well the facts of colour- 

 mixing, none of the former theories will explain the facts of colour-blindness. 



