[ 55 8 ] 
chemical preparations, &c, whether of the animal or 
vegetable kingdom. 
Thofe, who imagine, that all falts and oils hurt 
the vegetating force of matter, have fallen into a great 
crrorj for from whence can fuch a vegetating force 
proceed, but from a due mixture and modification 
of the falts and oils with the earthy principle, which 
all the world allows to be of itfelf inert ? 
It is true indeed, that a very large portion of falts 
or oils renders iubftances antifeptic, or very flow 
either of vegetation or putrefaction, as is well known 
with regard to fea-falt, a large quantity of which 
preferves fubftances from putrefaction } though, as 
the learned Dr. Pringle obferves, a fmaller one rather 
forwards that procefs, as it does likewife vegetation. 
Caftor, which as I formerly obferved, is antifeptic, 
feems to owe this quality to nothing elfe but a large 
quantity of a lluggifih fetid oil, which it contains. 
LXXXIII. An Account of a Cure of a para- 
lytic Arm , by Ele&ricity : bt a Letter 
from Cheney Hart, M.D. to Mr. William 
Watlon, F \ R, S. 
Read Mar. 25, 
1756. 
rp 
Salop, March 20, 1756. 
‘Hough ’tis a long time lince I had 
occafion to write to you, yet I 
tak" the liberty of now troubling you with a letter, to 
acquaint you with the cafe of a yo mg woman I lately 
have had under my care at the infirmary here, upon 
whom 
