( m ) 
The defign of all thefe Glands is to feparate a muci- 
laginous kind of Liquor, that ferves principally to lu- 
bricate the Joynts, to make them fo flippery as to be 
rro^ed with thegreateft facility imaginable. It ferves like- 
wife to prefervethe ends of the articulated Bones from 
Attrition , and an immoderate incalefcence. But all 
thefe things it performs in Conju&ion with the Medul- 
lary Oil. Of which two Ingredients is made a Compo- 
fition admirably fitted for thofe ends : For the Mucilage 
adds to the lubricity of the Oil, and the Oil preferves 
the Mucilage from growing too thick and vifcous. 
The Author obferving the fame fort of Glands to fie 
between the Mufcles and Tendons, fuppofes that there 
is the fame mixture of an oily and mucilaginous Sub- 
fiance, the One being that Fat which is found between 
the Mufcles, and is fupplyed by theadipofe Glands $ the 
other being feparated by the mucilaginous Glandules, 
of which the common Membrane of the Mufcles is every 
where full This mixture in the interfaces of the Mufcles 
lubricates them and their Tendons, and preferves them 
from fhrinking, and from growing <lry and rigid. 
For the Generation of this Mucilage be fuppofes that 
Nature has defigned one large Vifms^ and that this is 
the Office of the Spleen 5 the Glandules of which he 
makes to have two fecretory Pores, by one of which 
fome Acid j and by the other fome Auftere Particles 
are feparated } which meeting in the fmall Cavities of the 
Glandules, they are converted into a mucilaginous and 
gummous Suhftance, having obferved that the Spirit of 
Vitriol mixt with a Decoftion of Gallsf, will produce 
a Gum. 
In the next place follows an account of fome Experi- 
ments made with the Mucilage,the moft of which come to 
this, that all Acids do coagulate it, as all Aufteres, and 
Auftere Acids : but with this difference that the Coagu* 
km or Curd made with Acids only is tenderer than that 
O which 
