[ J 86 ] 
into twenty-feven parts, the length of 
the deltoide, from its origin to its infer- 
tion, will be equal to fix of thefe parts, 
and a force not of 28 but of 126 
pounds will be required. If the angle oft 
infertion in the humerus is io°, and it 
is really not more confiderable the force 
will be as 1,736,482 is to 10,000,000, fo 
126 to 731 pounds. But as this weight 
Ihould be doubled, it will amount to 1462 
pounds. Again, as the fibres of the del¬ 
toide unite in the tendon under another 
angle of 32 0 , the refiftance of the deltoide 
will be again increafed, and amount to 
nearly 1680 pounds.” To thefe multipli¬ 
cations the author adds that refiftance 
, I • 1 
which arifes from the different ftrata of 
fibres, and finally eftimates the force of 
the deltoide to be equal to 61,600 pounds. 
“ Pone effe pondus brachii = qyatuor li- 
bris, et prseterea ex digitorum articulatione 
ultima fufpendi libras 24, quaeritur vis qua 
deltoides 
