168 Dreyer and Douglas. Velocity of Reaction in [Nov. 16, 



Hughes Medal. 



The Hughes Medal falls this year to Eichard Tetley Glazebrook, F.R.S. 



Dr. Glazebrook has for many years been closely identified with the 

 construction, testing, and evaluation of electrical standards. Not only has he 

 published important memoirs on these subjects, but, as Secretary for a very 

 long period of the Electrical Standards Committee of the British Association, 

 and more recently as Director of the National Physical Laboratory, he has 

 taken a leading and responsible part in this type of scientific work and in 

 conferences of international importance. It is thus specially fitting that he 

 should be the recipient of the Hughes Medal. 



The Velocity of Reaction in the '^Absorption" of Specific 

 , Agglutinins hy Bacteria, and in the " Adsorption " of 

 Agglutinins, Trypsin, and Sulphuric Acid by Animal 

 Charcoal.* 



By Georges Dkeyer, M.A., M.D., Professor of Pathology in the University 

 of Oxford, and J. Sholto C. Douglas, M.A., B.M., Pliilip Walker 

 Student in Pathology in the University of Oxford, formerly Piadcliffe 

 Travelling Fellow. 



(Communicated by Prof. F. Gotch, F.R.S. Eeceived November 16, 1909, — Read 



Jarmary 20, 1910.) 



(From the Department of Pathology, University of Oxford.) 



Arrhenius, in liis different papers dealing with equilibria in absorption 

 processes, has used the alleged differences in velocity of reaction between the 

 absori)tion of agglutinin by bacteria and the adsorption of a dye by a filjrc, to 

 assist his conclusion that these processes are of dillerent natures. 



While a fair number of observations (Bordet, Bayliss, Hedin, etc.) exist as 

 to tin; iiilhunuu! of time on the so-called adsorption processes, e.f/., the adsorption 

 of an acid by charcoal, or of a dye by a fibre, proving that it takes a very 



■* 'I')i<! (■x|)eriinciitH in tliis j)a])er wore ])artly carried out in the University Tjaboratory 

 for Medical ]5actei iology, (Jopeidiayen, and we wiali to express our gratiiude to I'rof. 

 SalomonHen, the Director of that Ijaboratory, for the great facilities he always granted us 

 while we woi'ked there. 



