g % Hcemajlatta. 
we have many inftances of in effervefeenc 
Mixtures, feveral of which will, with feem- 
ingly equal Degrees of Effervefcence, acquire 
very different Degrees of Heat, which may 
depend either on the different Nature or 
Texture of their component Particles, or the 
different manner of the Adion of thofe Par- 
ticles on each other : Thus even of folid Bo- 
dies rubbed againft each other fomewill foon- 
er acquire a burning Heat than others, hee^ 
wenhoeck has obferved that the Blood of Fiflies, 
which is much cooler than that of other Ani- 
.mals, has a greater Proportion of Serum in 
it : The Blood of a Land Animal has twenty 
five times more Globules in it than that of a 
Crab. If according to Dr. Jurin's Eftimatc 
in Moifs Abridgment of Philof. TranfaEt. 
Part II. p» 143. the Quantity of the Blood 
Globules be 4th of the Blood : And if as he 
has eftimated it a Diameter of a Blood Glo- 
bule be of an Inch ; then the ;;th of 
the Cube of 3240, •v/z, 8,505,05^,000 will 
be nearly the Number of red Globules in a 
cubic Inch of Blood : And the Diftance of 
the Centres of the Globules from each other 
will be Inch. 
i. Dr; 
