( 4^o ) 
alone, which is fo far from diflblving the Blood, that 
it rather Coagulates it ; for it is found, that if an Injc- 
, aion of Water be made into the Lungs, the Blood will 
be Coagulated there, and the great coldnefs thereof 
permits us not to doubt of it ; neither is it likely to be 
a Salt contained in the Water that may caufe it for 
it is not Marine Salt, fince Fifli live as well in Frefli Wa- 
ter as Salt- nor is ic a Nitrous Salt, finre they live in 
places where there is not a jot of it ; it may yet be 
thought, that this Salt containing an Alkali, it mixes 
part thereof v/ith the Blood of the Fifties that are in 
the Sea, which makes their Blood to be more diflblved 
and fJuid than that of Frelh Water Fifli ; and it is 
obferved that Sea Fifti are of a more cold Temperament 
than thofe in Frefli Waters are. 
Ii-feems then to be the Air that is contained in the 
Water , that difTolves the Blood in the Bronchia^ of 
Fifli, as well as it does that in the Lungs of all other 
Animals. It cannot be doubted but that there is Air 
in all Water ; the Experiment of that famous Perfon of 
the Academy, Monfieur MaroOe has put this pafl difpute : 
He fee a Veflel of Water over the Fire, fo to drive 
out the Air from it ; for the Bubbles that arife from 
hot Water, are only Air that breaks loofe from it, 
enveloped with fome watery Particles. This Water he 
put in to the Air Pump, to draw out the Air from it 5 
^nd after that filled a Vial with it, within Two or 
Three Fingers of the top, which fpace he left full 
only of A\ic, and ftopt the Viol well ; and by fliaking 
it, the Water Imbibed the Air, fo as to rife up and quite 
fill the Viol. 
It may be o bjefred, that if the Air in the Water were 
the caufe of this efFed, theFifti would live in the open 
Air. I fliall only reply to this, that Fifh have their 
l^filoed naturally lefs hot then ours, fo that the natural 
Heat 
