POISOXOUS ACTION OF ALCOHOLS UPON DIFFKREXT ORGANISMS. 271 



rendered insensible, the other two were still tnoving after one hour. 

 After 24 hours, however, all of them recovered, those in ethyhc 

 alcohol beinir much weakened, while those in niethylic alcohol were 

 ahnost uormah Tadpoles in 'l^j^ solution of ethyhc alcohol ceased to 

 move in K) minutes and after 24 hours two of them died, while :i 

 third, although aj>|)arently recovered, died 40 hours later. A 2'^/,, s(jlu- 

 tion of methvlic nlcohol ])r<n^ed to be much wenker in acti<m upon them 

 than ethylic alcoliol. All were ap]>;n-ently insensible in fnmi 20-50 

 minutes, but onlv one of them died ;ifter 24 hours, while the other 

 two recovered, and were still alive 40 hours after. In 2.5 ^j^ solutions, 

 however, they were insensible in Ironi 4- LS minutes, and died soon 

 afterwards. 



In furthei" experiments with propylic alcohols (norninl and iso) 

 we found that : — in 0.5 ^'/,j solutions the tadpoles stopped their motion 

 within 40 minutes in the normal and within 'M) minutes in the iso- 

 propylic alcohol, and after 24 hoiu's two of them recovered in each 

 case, while the others died. In 0.7 ^/^ solutions motion ceased after 

 17— oO minutes immersion in the normal and after 9-20 minutes in 

 the iso-alcohol. After 24 hours, however, although those in the 

 normal alcohol were dead, tw(j in the iso alcohol partly reco\ered, 

 only one (jut of the three dying. In P/^ solutions of these alcohols, 

 the animals became insensible within 10 minutes, and died soon 

 afterwards. In the case of the butylic alcohols insensibility set in 

 within 5 minutes in ".o"/„ normal butylic, after 3-!:) minutes in 

 0.5 °/o isobutylic. and after .'1-15 minutes in t).7^/o tertiary butylic 

 alcohol, death following in all these cases within 24 hours. In- 

 sensibility was also established after 9-14 minutes in O.o*^/^ isobutylic 

 alcohol and after 9-20 minutes in 0.5*^/,, trimethylcarbinol, but in 

 both cases the animals recovered. thouQfh those in the foriner alcohol 

 seemed much nKjre prostrated than those in the latter. 



