C 3 12 ] 
the fpleen has been commonly believed to 
be in confequence of obftru&ions, but 
DoCtor Rezia, ProfeiTor in the Univerfity 
of Pavia, a great anatomift and phyfician, 
has combated this erroneous opinion, in a 
\ I 
differtation publifhed fome years ago. 
Nutrition may likewife undergo changes 
with regard to the quality and nature of the 
matter feparated; as for inftance, we fre¬ 
quently find in different parts of the body 
bony productions, fecreted and depofited by 
the blood-veflels. (Vide Haller, Opufcul, 
Pathol. Obf. xlvii.) In the hiflory of 
Medical Obfervations, we meet with fe- 
veral inftances of the hair of the head be¬ 
coming grey in an inftant, on hearing very 
diff re fling news. 
After exruciating pain, the bones have 
been known to become foft and flexible, 
(Gagliardi, Morgagni.) The enlargement 
and caries of the teeth in the fciirvy, are 
the 
