rhe INTRODUCriON. 
Bodies ; efpecially confidering that they are 
in a manner framed of one continued Maze 
of innumerable Canals, in which Fluids 
are inceffantly circulating, fome with great 
Force and Rapidity, others with very diflFe- 
rent Degrees of rebated Velocity : Hence 
1 was encouraged to refume the Enquiry, 
by Variety of fuch Experiments as I con- 
jedured would give fome Light into the 
Matter. 
4. It may well be wondered at, that 
one who neither by Profeflion nor Inclina- 
tion, is prompted to deal in anatomical 
Operations, (hould engage in a Thing of 
this Nature ; efpecially in an Age and Na- 
tion that abounds with ingenious Perfbns, 
who are eminently skilled in Anatomy ; 
and who have brought the Art of pre- 
paring and injeding the finer capillary Ve(- 
fels, with proper coloured Ingredients, to a 
good Degree of Perfedion. 
5. But as the animal Canals have not^ 
that I know of, been hitherto examined 
any other Way, than by the imperfed and 
uncertain Methods of injeding with a Sy- 
ringe and blowing into them i I hope it 
will appear from this Specimen to be worth 
the while to attempt it in the following 
IlydratiJtck 
