366 ANATOMICAL PREPARATIONS 
I have now only to fpeak of the wafte that comes from 
the battiie, and the hufks of the cocons, that have ftill 
fome filk upon them, which are thrown into bafkets in 
winding, and are what we call more/ques. Thefe you firft 
dry in the fun, then threfh, and afterwards card and {pin 
them to make fleuret. One hundred and fifty ounces of 
good cocons yield about eleven ounces of filk from five to 
fix cocons; if you wind coarfer, fomething more. You 
may wind about eleven or twelve ounces of filk from five 
to fix cocons in fourteen hours. 
The filk which is made of baflinats and bad choquette 
ferves to make ftockings and coarfe heavy ftuffs, fuch as 
fattinades and damafks for hangings, &c. &c. 
N° XLII. 
The Art of making Anatomical Preparations by Corrofion. 
By Joun Morean, M. D. Profeffor of the Theory and 
Practice of Phyfic mm the Umverfity of Pennfylvania, 
Member of the Royal College of Phyficians at Edinburgh, 
and F. R.S. at London, &c. 
S no branch of f{cience more certainly leads to an in= 
timate acquaintance with the functions of the ani- 
mal body, (which is the foundation of all rational know- 
ledge of the caufes and cure of difeafes) than that of the 
ftru€ture of the vafcular fyftem, the origin, divifions, dif- 
ferent ramifications and numerous inofculations. of the 
veflels into, and their communication with each other, I 
have always thought this field of ufeful information de- 
ferved to be cultivated with great induftry and attention. 
In effet it brings us immediately, and in the moft com- 
pendious way, to acquire a knowledge of the nature, and 
of the motions of the fluids which circulate through them, 
of their diftribution throughout the different parts of the 
body, 
