AND ITS EFFECTS UPON ANIMAL LIFE. 



73 



No. 19. Brown-Si5quard Experiment. 



Commenced at 10.30 a.m., April 20, 1894. Mice in 7-litre bell jars. 5 in series. HjSO^ absorber. 



No. 3, 7 g. 



COo. o. 



No. 4, 18 g. 



COj. O. 



7.627 

 8.568 



9-637 

 9.62 



5-87 

 9-159 



13-73 



No. 5, 33 (T. 



CO,. o. 



1 1 . 716 10.58 

 I0.029I 10.69 



9-73 

 9-15 



13.22 



4-23 



11.238 

 11.258 



7-70 

 10.87 



8.226 

 7-418 



14. 12 



7-809 

 7-238 



II . 267 

 7.40 



a 

 b 



d 



+ 



3.816 



Remarks. 



18.5 litres asiiirated. All 

 show oijpression. 



133.5 litres aspirated. All 

 oppressed. Current re- 

 duced slightly. 



Current the same. 



144 litres aspirated 

 are oppressed, 

 rent increased. 



213 litres ; current 

 same. 



306.5 litres, 

 pressed, 

 duced. 



All 

 Ciir- 



the 



All are op- 

 Current re- 



324 litres aspirated. Cur- 

 rent increased. 



406 litres aspirated. Cur- 

 rent reduced. 



421 litresaspirated. Cur- 

 rent the same. 



428.5 litres. Nos. 3, 4, 

 and 5 are very sick. 



No. 5 died. 



The others are very sick, 

 especially No. 4. 



No. 4 died. Experiment 

 stopped. Others soon 

 revived. 



a No. 4 of last experiment placed in No. 5 jar ; died in two minutes. 



b White mouse, used in Experiment 17, placed in No. 5 jar ; died in two and one-half minutes, 

 c White mouse, used in Experiment 17, placed in No. 4 jar ; died in three and one-half minutes, 

 d Small mouse, used in Experiment 17, placed in No. 5 jar ; died in one minute. 



