June, 1917.] ARSENICAL RESIDUES AFTER SPRAYING. 



33 



Table No. 9. Result of Feeding White Arsenic AS2O3 to 



Guinea Pigs. 



,. *: <^^'rK 



. J 



' Z CheeK 

 ^' -  



«•< 7« I 



Si,  J I 



S3. 1. J 



SS ,1 .. ... . J 



z. 

 e6. M^^M^i^ >-- .. ..J 



z 

 y? ^ * 4 



^a— ^— ^^— J •» 



si^m^mmmaamtam^^mmd 4 



if <ii:*'£'i _ _ f .| 



^MBHHHillM^ -* 



^y^HHHUMHlri 



JO 



* 



Horizontal lines indicate periods during which the poison was administered. 

 1 centimeter equals 11 days. Number "at the right end of each solid hori- 

 zontal line indicates number of "units" fed daily. A "unit" is the average 

 maximum residue found per apple in analyses. Dotted hnes indicate rest 

 period during which pig received no poison. A cross at the extreme right hand 

 end of line indicates death of pig. 



