we faw it very well 3 but by the Affidance of an InCxrU", 
rnent I had prepared to expand the Mefentery^ Vt/e all law 
it there much better 5 that part having not only larger and 
clearer fpaces than the Omentum^ but its Blood Veflels are 
diftributed more regular, as appears by Fig. the 5th, where 
the fame Letters of reference ferve as above. 
Thofe who will entertain themfelves in viewing the. 
tranfparent parts of Living -Creatures with Mkrofcopes, will 
find that the ejftremities ot their Arteries and Vews are not 
all equally lelTeny, tho united. In the Tail of the Lacerta 
Aqudtica, Taclpols, and in moft Fifh ( I have examined )" I 
have frequently obferv'd -fcveral Cooimimications between 
the Arteries and Veir/s ^ in which more than two Globules 
of Blood have paft abreaft : And in the fame Area I have 
feeri fome of thofe Communications {o fmall, as that but one 
Glcfbule could pafs, and that very flowly before the other. 
In ^'oung Fiflj, particularly in Grigs, I have frequently ob- 
ferv'd a Commumcant Branch, fp very fmall as that one Glo- 
bule of Blood only has paft it in two or three feconds of a 
minute : at other times I have found confiderabie Intervals 
in paffing of one Globule in fuch a Comoiunicant Branch 5 
even half a minute, a whole minotej and once in two or 
three minutes I have feen one Globule of Blood only pafs 
in a particular trad. 
The prompt paffing of Liquors, injecied by the Splenick 
Arteries^ to the Feins, /hews the Communications between 
thofe Veffels are more open than the Arteries and Plains of 
other parts, of which 1 have clfewhere fpoken. 
Liquors alfo Injected into the Pulmonick A/tT/e/ pafs to 
their Veins, tho not altogether fo freely as in the Spleen. 
On viewing the Extremities of the Pulmonick Biood- 
Vefiel6 in a living Frog with my Microfcope, I founS tiieir 
Communications much larger than thofe that [ liad bciore 
feen in tlic Membrane between the Toes and in the Feet of 
the fame Creature. Nor can we reafonably doubt of the 
like patent Communications of the Arteries and Veins of 
