THE CHEMIST 11 Y OF VENOMS. 

 II. Copper-venom-ylolndin. 



19 



III. Diali/sis-venom-f/lobulin. 



It will be noticed by a careful comparison that the corresponding principles in 

 different venoms differ quite as much from each other as the globulins in any one 

 variety of venom. 



Venom Peptones. We have not been able to detect any chemical differences 

 in the venom peptones of the Crotalus and Aneistrodon. Cobra venom peptone 

 is distinguished from that of the Crotalus and Aneistrodon by its non-precipita- 

 bility by mercuric chloride and absolute alcohol. 



Daboia Venom. We have had a small quantity (a few grains) of Daboia venom 

 at our disposal, but too little to attempt any detailed chemical investigations. In 

 two examinations, however, with very small quantities, we separated two bodies 

 corresponding to those in Cobra, that is a water-venom-globulin and a peptone. The 

 former exists in exceedingly small quantity while the latter dialyses with appa- 

 rently much more difficulty than that of the Cobra. 



The Proportions of Proteid Constituents in Different Venoms. An examination 

 of good specimens of the dried venoms of the Crotalus adamanteus, Aneistrodon 

 piscivorus, and Cobra gives us the following proportions of the globulins and 

 peptones : 



