14 
spasms. Inasmuch as the eucalyptol is not so 
quickly absorbed as the brucin solution, it 
becomes necessary to allow some time for the 
action of the former before the latter is adminis- 
tered. 
The behaviour of lower animals under the 
influence of eucalyptus oil forms the theme of the 
eighth chapter. Among the number of experi- 
ments recorded by Professor Schulz are also some 
instituted on paramecia, to which no nervous 
system can be ascribed, Nevertheless, they show 
in a striking manner how the oil acts first irrita- 
tingly on the minutest and simplest of organisms, 
but how also in them the final effect is a general 
paralysis. In the more highly developed animals 
we see, however, the action of this oil the more 
strongly expressed, as their nervous system is 
more highly developed. In avertebrate animals 
two stages are observed under the action of 
eucalyptus oil — that of irritation and that of 
paralysis ; but whether the increased vivacity 
arises from central action or is merely the sequence 
of the external application remains to be made 
out. In fishes a well-marked stage of narcosis 
has been observed while experimented on between 
the irritation and the paralysis ; but in amphibia 
this intermediate stadium is not so well expressed, 
and it does not seem to occur in mammals. 
The eucalypts exercise some effect on various 
insect pests, and likewise entozoa, Siegen noticed 
