Of the Circulation of the Blood. x 5 
two other branches, which vent their ftreams at p and 
q, into the vein C. 
Moreover from the fame artery D, about r, proceeds 
forward a fmall one r f, which is divided into finer 
branches, one of which r f t, joins the vem C, the other 
f, u, w, x, joins the vein E at x. 
The moft evanefcent artery, flowing from the large 
one D, which is reprefented by the letters r y z, unites 
with the vein E at A; the fame minute artery, near 
the letter u, is again divided into two branches, the part 
u b is dif^rged into the vein C, at t. 
An eel 'of this fize may be conveniently placed be¬ 
fore the magnifiers in the microfcope, either in the fifh 
pan, or in a fmall glafs tube filled with water, and put 
between the object-plate and firings, after wiping off 
its flime, which would obfcure the glafs, flop both its ends 
to prevent the water from running out; the tail may then 
be viewed, and the circulation will appear in an agreeable 
and pleafant manner, as in the foregoing- figure is de- 
fcribed. 
The tails of any fort of fmall fifh, may be alfo readily 
applied to the magnifiers in the fame manner. Under 
the fpring of the fifh-pan, or tied on a flat glafs, 
flounders, eels, and gudgeons live a long time out of 
water, and are to be had at almoft any time in London 
alive. 
Alfo the tail h of a water newt, or a lizard, if applied 
to the microfcope in a glafs tube, reprefents an agreeable 
profpect of the circulation, through variety of fmall vef- 
fels, particularly in an exceeding fmall one of the water- 
kind, which may fometimes be procured fhorter than an 
inch, and fo traitfparent, that the blood may be feen 
running in all directions, not only through the tail, but 
p.rrticu- 
