Hcemajlatks. 167 
Arteries, and are out of the Coiirfe of the 
circulating Blood :Thefe as they do not fuftaiii 
the full Impetus of the arterial Blood, but on- 
ly fcrve more (lowly to feccrn and convey the 
more diluted Part of the Blood, which is pro- 
per either for Nutrition, Perfpiration, 
fo neither are their Coats near fo ftrong as thofe 
of the Arteries and Veins ; as is manifeft from 
Experiment XIV. Numb, 6, where when Wa- 
ter flowed into the Arteries, with a Force no 
greater than chat of the arterial Blood 5 yet ic 
pafling freely by reafon of its great Dilutenefs, 
into thofe fecretory Veflels did thereby much 
dilate all the Parcs of the Body. And it is 
obferved that as the elaflic Power of thofe 
Veflels, and alfo the Force of the Liquor that 
flows in them is but fmall, fo are Obftrudi- 
ons apteft to be in the Glands, where thefe 
Veflels are both very complicated and nu- 
merous. 
zy. Tho* in a living Animal there is very 
rarely if ever, fuch an univerfal Inundation and 
Dilatation of all the Parcs, as is here made by 
thefe Experiments on Dogs ; yet ic frequently 
happens, chat on the Stoppage of one of the 
natural Evacuations thro* theie excretory Dufts, 
that others will be increafed and vice verfa^ 
M 4 Thus 
