II. 
In this Eftay I have nothing in my View but the 
Confideration of a mufcular Fibre , and that of a 
nervous one, with the Manner of Mufcular Motion's 
being performed ; having purpofely negleded to touch 
upon the Nature of Senfation, or indeed any Calcula- 
tions of the Force or Powers of Mufcles ; becaufe they 
are already well treated of by feveral ingenious Authors j 
and are capable of being handled upon Rules of fome 
Certainty ; being a Part of the Subjed very different 
from what I take to be the Purpofe of the Qroitnian 
Lectures: ■ 
m. 
Since, then, thofe worthy Gentlemen have done 
me the Honour of appointing me to continue thefe 
Ledures on Mufcular Motion for the prefent Year, 
according to the Will of the late Lady Sadler , I fhall 
endeavour, to the beft of my Power, to gratify them j 
yet confefs myfelf very unequal to the Task ; efpe- 
cially, « as feveral of the moft learned and ingenious 
Phyficians of all Ages have hitherto undertaken it 
with fo little Succeis. However, in order to render 
what I fhall advance upon the Subjed the more clear 
and fatisfadory to the Society , fome of whom may 
not have made this Part of JPhilofophy their Study, 
I prefume it will not be difagreeable to premife the 
following brief Hiftory of the moft remarkable among 
the Opinions that have gone before us, by way of 
Introdudion ; which will alfo ferve to facilitate the 
Confideration of this Subjed, to whofoever fhall 
