( 15 ) 
this Invention The Numbers given will ferve to 
examine the Truth of what I have averted concern- 
ing the Motion of the Mercury : And fiom them 
one may make Tables to ferve to proportion thefe 
Engines for raifing any Quantity of Water to any 
Height, according to the Power one has to apply. 
in. ^art of CL Letter from A/r. Peter Derante, 
Chirurgeon in Waterford, to Mr. John Douglas, 
Chlrurgeon^ F. % ^ concerning the coming off of 
the Scapula and Head of the Os Humeri, upon 
a Mortification, 
\ 
I /^^N the 5th of November, 1713, On^John Fletcher, 
on board the Neptune of Leverpool, had the Mis- 
i fortune to break the Radius and Ulna (of his left Arm^ 
r and their Ends burft thro’ the Skin. He was immedi- 
I ately drefs’d by the Surgeon of the Ship with the com- 
i mon Aftringents and Bandage ; about five or fix Days 
I afterwards I was fent for to go down to Faffage to fee 
1 this Man. When I came there, I found his Surgeon along 
with him, who told me. That the Man would do very 
n well, becaufe he was in no pain at all? however, I 
b defir’d him to take off the DrefTings, and let me look 
3 on’t. Which being done, I found it was black and 
i infenfible from his Fingers to his Shoulder, and there- 
^ fore advis’d the Extirpation of it immediately, but 
his Surgeon oppos’d it ; however, I fcarified it in fe- 
veral Places, and very deep, and then apply ’d a warm 
DrclTing. Next Day the Shin put to Sea, and the poor 
C X Creature 
