EXPERIMENTS WITH POISOKS. 177 



No. 10 (5 birds). — Fed on wheat soaked forty-eight hours in solution of strychnine 

 (.03 of a gram to 30 c. c. water). Commenced eating at 1 p. m. At 2 p. m. the first 

 bird was dead and another badly affected, but recovered. Two were dead next 

 morning. The fifth bird was not affected; probably did not eat enough. This solu- 

 tion would seem to be too weak to give certain results. 



EXPERIMENT WITH TINCTURE OF NUX VOMICA. 



No. 11 (3 birds). — Fed on wheat soaked twenty-four hours in tincture of mix 

 vomica and dried. At 10.30 a. m. one bird eating; at 10.55 affected; at 1.15 p. in. 

 symptoms passing off; recovered. At 1.15 p. m. second bird dead ; stomach contained 

 8 kernels of wheat ; crop empty. Another bird commencing to eat at 11 a. m. died at 

 1.10 p. m ; stomach contained 4 kernels of wheat ; crop none. 



EXPERIMENT WITH CORROSIVE CHLORIDE OF MERCURY (CORROSIVE SUBLIMATE). 



No. 12 (2 birds). — Fed on wheat soaked twenty-four hours in a saturated solution 

 (in water) of corrosive sublimate and dried. Birds commenced to eat at 10.30 a. in. 

 First bird died at 1.15 p. m. ; stomach and crop empty. Second bird died at 3 p. m. ; 



2 kernels of wheat in stomach; crop empty. 



EXPERIMENTS WITH WHITE ARSENIC. 



No. 13 (1 bird). — Fed on Indian meal aud white arsenic (15 to 1) mixed with a 

 little water Commenced to eat immediately (9.45 a. m.). At 3.45 p. m. bird still in 

 good spirits. Dead next morning ; stomach and crop empty. 



No. 14 (1 bird). — Fed same as No. 13. Commenced to eat at 9.30 a. m. ; badly 

 affected at 2 p. in. ; dead at 2.54 p. m. Stomach and crop empty. 



No. 15 (3 birds). — Fed same as Nos. 13 and 14. Commenced to eat at 8.45 a. m. At 



3 p. m. two affected, and one seemed in good spirits. All were dead next morning. 

 Stomachs and crops empty. 



No. 16 (2 birds). — Fed on Indian meal and white arsenic (15 to 2), aud moistened. 

 Commenced to eat at 10.30 a. m. First bird died at 3 p. ru. ; stomach and crop empty. 

 Second bird affected at 3.20 ; dead next morning. 



* EXPERIMENTS WITH ARSENIATE OF SODA. 



No. 17 (1 bird). — Fed on hemp-seed soaked one and one-half hours in a solution 

 of arseniate of soda (1.56 grams to 30 c. c. water) and dried. The bird ate freely, but 

 recovered. 



No. 18 (1 bird). — Fed on hemp-seed soaked one and one-half hours in a solution of 

 arseniate of soda (2.10 grams to 30 c. c. water) and dried. Dead (time not taken)- 

 Stomach and crop contained 12 hemp-seed. 



No. 19 (2 birds). — Fed on wheat soaked in a solution of arseniate of soda (2.10 

 grams to 30 c. c. water) three hours and dried. Commenced to eat at 9.30 a. m. First 

 bird dead at 10.35 a. m. ; crop empty ; stomach contained 4 kernels. Second bird dead 

 at 2.35 p. m. ; crop aud stomach empty. 



EXPERIMENT WITH LIQUOR POTASSI ARSENITIS (FOWLER'S SOLUTION). 



No. 20 (2 birds). — Fed on wheat soaked for seventy-two hours iu Fowler's solution 

 of arsenic (liquor potass; arsenitis). Commeuccd eating at 10 a. m. ; lively at 4 p. m. ; 

 both dead next morning. 



EXPERIMENTS WITH ARSENITE OK CALCIUM (LONDON PURPLE). 



No. 21 (1 bird). -One hungry bird exposed to ground hemp-seed and London pur- 

 ple (15 to 1) for five hours, but would not touch it on account of its marked color. 



Note.- When mixed with whole grain the color is not so conspicuous (see next ex- 

 periment). 



8404— Bull, !<■ 12 



