POISONOUS ACTIOX OF ALCOHOLS UPON DIFFERENT ORGANISMS. 273 



0.1-0.005 ''/„ and even in the Intter ca.se all life was extinct within 24 

 hours. Amylic alcohol in O.P/^ killer! all ostracodes and many in- 

 fusoria within one day. flioijo-h some infusoria were found alive even 

 after 5 days, hut by a solution of 0.5'y„ all aiiiîuîils without exception 

 were killed after one day. In biitylic alcoliol of the same strenu'th 

 most of the animals died after two days, ind in isobutylic alcohol after 

 3 days ; the feM" indixidnals that still showed signs of life Avere 

 evidently more or less paralvsed.' 



In 1 "/o solntions of normal l)uty]ic, isobutylic, and tertiary butylic 

 alcohol (trimethylcarbinol). and of isopropylic and propvlic al(X)hols 

 infusoria were found dead after 18 h(jurs, ostracodes after 1<S hours 

 in isopropylir and butylic alcohol, after two days in isobutylic 

 alcoliol, and after three days in propylic alcohol. In tertiary bntvlic 

 alcohol most ostracodes were dead after two da}^^, but some individuals 

 still showed ccmvulsions two days later. 



The observations made concernini;- the activity of methylic and 

 ethylic alcohol are contained in the following table : — 



I. In another experiment the animals died sooner, the temperature, which, <.i course, has 

 o-reat influence, beins? higher. In the experiments with sohitions of normnl and isopropylic 

 alcohols of the same dilution, the animals were found alive after four days. 

 2. Compare O Lœw, Xntiir!. System dn- Giftwirkuvi/en, S. 26. 



