AND FAMILY DISPENSATORY, 103 
affiftant to the voice in fpeaking, and to the fenfe of {melling. . They. are alfo 
emunctories of the blood, and are of many other important fervices, The principal 
difeafes to which the lungs are fubjeét, are the Afthma, Confumption, Peripneus 
mony, &c. ' 
Or tHe GENERATION anp CIRCULATION or tur BLOOD. 
. THE origin of the blood is in the chyle, which, paffing the lacteals, is delivered. 
into the fubclavian; where, mixing with the blood, they proceed together to the 
right ventricle of the heart; and there, being yet more intimately mixed,’ they cir- 
culate together through the whole body: till, after feveral circulations, and fecre-_ 
tions at the feveral ftrainers of the body, they are affimilated, fo as to make one uni- - 
form compound mafs, which appears to be nothing elfe but chyle altered by the 
artifice of nature, and exalted into blood; there being no appearance of any thing 
extraneous mixed with the liquor circulating in the blood-veffels, but chyle; ex- 
cepting what had been before feparated from it, for fome particular purpofes, which 
being once ferved, it is returned to it again: unlefs, perhaps, it may receive fome 
- portion of air in the lungs. — 13 23 
. The blood, while in its veffels, appears to the naked eye uniform and homoge: 
neous; but, when let out and cold, it feparates fpontaneoully into two different parts; 
the one red and fibrous, which coheres into a mafs, and is called the crwor; the other 
thin and tranfparent, which retains fluidity when cold, and, being fuppofed {pe- 
cifically heavier than the other, fuftains and bears it up, and is called the ferum, If 
the red part of the blood bears too great a proportion to the ferum, which is the cafe 
of athletic perfons, and others who do not take a fufficient quantity of drink with 
their meat, the fault may be corrected by leffening the meat, or by increafing their 
rink. In the beginning of fevers, the proportion of the red part of the blood to the 
ferum is greater, and at the end of them lefs, thanit isin health, The change of this 
proportion is owing to perfons under this diforder living wholly on drink and liquid 
nourifhment ; and bodies loaded with ferous moifture, being an argument of too 
{mall a proportion of the red part of the blood to the ferum, have been freed from 
their load by abftaining wholly from drink. There are other caufes befides the bare 
quantities of meat and drink, which vary the proportion of the red part of the blood 
to the ferum; for this proportion is greater in country-people than in citizens, in 
‘perfons who ufe exercife than in perfons who are inactive, and in perfons who live 
upon flefh meats and fermented liquors than in perfons who live upon vearabie 
‘and water. In fhort, this proportion is increafed by things which dry the body and 
ftrengthen the fibres and leffened by things of a contrary nature. Too great a pro- 
portion of the red part of the blood to the ferum renders bodies fubjett to is fam- 
