[ l 79 ] 
Difcharge with Povvdct colle&ed. 
large Powder. dwt* gr. 
i. i. n. 
IT. • . * * O 3 I. It5* 
III. «“..••*« I. 2 1. 
And the Powder being bruifed in a Mortar, and 
lifted through a Lawn Sieve, the Charge and Ball be- 
ing as before, what was collected after Three Dif- 
charges, was One Penny- weight Ten Grains, One 
Penny-weight Eight Grains, and Seventeen Grains. 
Mr. TVatfon having had two Parcels of Powder de- 
livered to him, the one frefh, and the other collected 
after Difcharges with Ball, gave an Account of the 
Quantity of Nitre he had feparated from them, viz. 
Separated from Nine Penny-weight of ? 
frefh Powder 5 
dwt. 
Nitre . . 
6. 
2. 
Refiduum 
2. 
7- 
Lofs i I 
O. 
15. 
From Niqe Penny-weight of Powderp 
colle&ed after having been difehargedb 
with Ball \ 
dwt. 
& r - 
Nitre . . 
4- 
18. 
Refiduum 
2. 
15. 
Sand, & c . 
O. 
II. 
Lofs . . 
I. 
14. 
Twelve Grains of the Powder gathered and put into 
feparate Boxes, after firing with Ball out of the fhort 
Piece, as before-mentioned, being fired in the ex- 
haufted Receiver, funk the Mercurial Gage from 
Twenty-nine Inches One-tenth to Twenty- three Six- 
A a tenths. 
