154 ANIMALS KILLED IV, 
air confined. The liquids injurious ahd advans 
tageous to them are the following: Thofe in+ 
noxious, I underftand to be fuch as either revive 
them or preferve them alive when recovered ; and 
of this nature are, pit, river, ice, fnow, and rain: 
water, diftilled water, that of ditches, marfhes, and 
pools, the foetid water of mud and dunghills. 
With refpe& to the fluids pernicious, they are 
either thofe impregnated with pepper, common 
falt, fal-gem, fugar, vitriol ; thofe in which are 
expreffed the juice of onions, garlic, urine, ink, 
wine, verjuice, oil of olives, or nuts, brandy, vi- 
negar, and the like. I never faw wheel animals 
revive when their fand was put into any of thefe 
fluids, and all the revived animals put into them 
perifhed. Some ftrong and penetrating odours 
have been equally fatal, fuch as that of camphor. 
All the living ones long expofed to its effluvia 
die, and thefe expofed dry do not recover. The 
oil of turpentine produces only the firft effed. 
But if the odour becomes more active, as by 
melting or burning the turpentine, the fumes 
prevent the revivifcence of the animals. Both 
effeéts are produced by the fumes of burning 
fulphur and camphor; only revived wheelers 
are deftroyed by thofe of leaf tobacco. 
Reflecting on the experiments by means of 
heat, liquids, and odours, I have fometimes 
doubted whether thefe three agents had deprived 
the 
