obtained. It was soluble in alcohol, had a strong acid 



1 

 reaction and was free from nitrogen and sulphur. The 



nitrogen teats were made by the Las^^aign and 3oda lime 



2 

 methods , and the sulphur test waj made with sodium nitro- 



prusside after fusing the rcoidiie with sodium. The main 



portion of the lead compound was decomposed under alcohol by 



hydrogen sulphide, filtered, and the alcoholic filtrate 



evaporated in vacuo. The same yellow acid resin was obtained, 



Experiments continuing through several weeks were made in 



applying solution- of this kix resin to rats, rabbits and 



guinea pigs. Finding it to be without effect upon these 



animals it was tried on the writer and found to be not poison- 



3 

 ous • In the meantime the resin was being studied in 



the laboratory. 



1. ITitrogen was found very readily by the soda lime test 



in the ta.T left after extracting the original material 

 with 50^ alcohol, but was not found by the Lassaign 

 test. 



2. 3tevens. Amer. Jour. Pharm. 77, 255, June 1905. 



3. Whenever it is stated in this paper that a solution 



was poisonous or not poisonous, the test was made 

 by the writer upon himself. 



.23- 



