into vivid motionj and then gradually becaine 
motionless ; after liours the creatures were 
rigid, and they died in four hours. A crawfish 
(astacus fluviatilis) placed in water containing 
five parts of oil of eucalyptus in 1000 paids, 
shewed first some violent motion ; after an hour 
the respiration was slower, though the animal was 
moving its tail vehemently, the eyes withdrew but 
slowly on touch, and the creature soon turned on 
its back, becaine motionless, and died in five 
hours ; another specimen expired in half a day 
when placed under a bell glass, to the summit of 
which cotton-wool sprinkled witli eucalyptus oil 
was fixed ; a third specimen perished after 13 
minutes from the injection of one drop of the oil 
behind the thorax-plate. The neuropterous perla 
microcephala, after at first becoming excited, 
dropped off in an liour motionless, through the 
mere inhalation of the spontaneous vapour of 
eucalyptus oil. Cockroaches (blatta orientalis), 
when similarly exposed to air pervaded by 
eucalyptus oil, fell after increased prior agitation 
in half an hour on their back, and became torpid 
in 1^ hours. Humble bees (bombus lapidarius) 
under similar circumstances turned motionless in 
three quarters of an hour. Flies (musca domes- 
tica, M. vomitoria, &c.), exposed to eucalyptus 
odor, died in about half an hour after previously 
violently flying about. Slugs (limax agrestis), 
thus exposed, died almost as quickly, after prior 
