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Exfoliation that hath happened : And that the Matter 
confined, in time having acquired a greater Acri- 
mony, hath gained the Power of foftening, diffolving, 
and deftroying entirely the Bone, wherein the Cir- 
culation of the Juices was preferved exclufive of any 
other Bone, that hath been laid out of the Way of 
that Circulation, or hath happened to be detached 
from it : Tho’ this laft evidently hath lain more under 
the Power of the Matter than the main Bone itfelf was; 
and to have been foaking longeft in that very Matter, 
which hath deftroyed that Bone wherein that Circu- 
lation of the Juices hath been preferved ; and there- 
fore, that the Way to a fpeedy Cure of the Spina ven- 
tofa> is, the making, as foon as poffible, a fair Open- 
ing into the medullary Cavity of the Bone that is 
affe&ed with it. 
Fig. 3- 
Reprefents the anterior Surface of the left Tibia of 
a young Perfon affe&ed with a Spina vent of a , in- 
cloftng an Exfoliation detached from all the Cir- 
cumference of the Medulla , about feven Inches 
in Length j which is to be feen through a great 
Number of Openings in the Cortex of it. 
A A , An Exoftofis , or Incruftation in the Bone in- 
larged, with an Opening in it four Inches long, 
and one broad, through which the inclofed Exfo- 
liation BB appears ; the Caries of the Bone in the 
Joint of the Knee, and nine large Openings in the 
Body of it, having been made by the Matter dif- 
charging from the medullary Cavity, and caufing 
a Cariolity in the inclofing Bone only ; whilft the 
exfoliated within is preferved in its natural State. 
Dd 2 C, 
