1909.] PUBLIC DOCUMENT — No. 31. 193 



enlarged and streaked with yellow caseous matter, and somewhat cal- 

 careous. 



The pericardium externally was free from evidences of inflammation 

 and contained one-half an ounce of serous fluid. Heart muscle firm 

 and red in color. The cavities of the left side contained small clots of 

 dai'k blood, those of the right side were empty. Valves smooth and 

 white. The trachea, larynx, pharynx, tongue, oral and nasal cavities 

 were free from lesions. 



Diagnosis : tuberculosis and acute gastro-euteritis. 



Chemical Ai^alyses.^ 



As indicated in the tabulated records, several samples of 

 material from different sources were collected for chemical 

 examination, to determine the presence or absence of either of 

 the essential constituents of arsenate of lead. 



From cow No. 1 both urine and milk were analyzed after the 

 animal had received, in small daily doses, 15 grams of the 

 arsenate. Neither arsenic nor lead was present. It should be 

 noted in connection with this analysis that only a few ounces 

 of urine and milk were sent for examination. At the su2:a;estion 

 of the chemist, in the collection of all later samples larger 

 amounts of material were taken. 



From cow No. 2 were furnished samples of tissue, consisting 

 of portions of the liver, kidneys and spleen. The parts from 

 the different organs were analyzed as a composite specimen, 

 which was found to contain abundance of lead and traces of 

 arsenic. 



From cows Nos. 3 and 4 samples of milk and urine were taken 

 on April 22, 24 and 25. No. 3 had been receiving small doses 

 of the arsenate since December 11, and had taken a total of 184 

 grams. No. 4 supplied both milk and urine for analysis. She 

 had received one dose of 28.35 grams on January 18, and sev- 

 eral smaller doses subsequently aggregating in all 90.35 grams. 

 Under date of May 29, 1908, the chemist reported on the three 

 specimens as follows : — 



The sample of milk forwarded by you on the date of April 23, for 

 a lead and arsenic test, has been analyzed. Neither of these poisons 

 was found present in sufficient quantities to detect it by ordinary 



1 These analyses were made at the experiment station laboratories by H. D. Haskins, in 

 charge of the Fertilizer Division. 



