1905 - 6 .] Standardising Suprarenal Preparations. 
171 
(/) The most satisfactory method is the determination of the 
dose just sufficient to antagonise (V6 mg. gr.) of nitroglycerin 
(Parke, Davis & Co.). Of adrenalin, 0-0075 mg. is sufficient. 
I wish to express my indebtedness to Dr Noel Paton for much 
help in the preparation of this paper. 
The expenses of this research were defrayed from a grant made 
to the Laboratory by Mr J. Francis Mason for investigations on 
the physiology of the ductless glands. 
( Issued separately May 21 , 1906 .) 
