[ 181 } 
consequently the Bullet mull be fcnfibly moved from its 
Place, before all the Powder that is fired, has taken Fire* 
As to the Second Queftion, Whether the Diflance 
to which the Bullet is thrown , may not become 
greater or lefs , by changing the Form of the Chamber , 
though the Charge of ‘ Powder and all other Circum- 
ftances continue unchanged 
The Committee are of Opinion, That the Change 
of the Form in the Chamber , will produce a Change 
of the Diftance to which the Bullet is thrown. Their 
Opinion is grounded upon the following Experiments, 
in which the longejl Chamber of equal Capacity drove 
the Ball fartheft. 
Three brafs Chambers were made, whofe Depths 
were refpe&ively Three Inches ; one Inch and half ; and 
Three-fourths of an Inch ; fo turned as to fit the Cham- 
ber of Mr. Hauksbee s Mortar $ each of thefe Chambers 
contained, when full, One Ounce Troy of Powder. 
The Ball was of Brafs, weighing Twenty-four Pound 
Six Ounces and an half Avoirdupois, that is, nearly 
Three hundred Fiftv-fix Ounces Troy *. 
The Ball touched the Powder of the Charge in all 
thefe Experiments. With the Firft* Chamber of 
Three Inches deep, the Elevation of the Mortar being 
Forty-five Degrees, the Ranges at Four different Trials 
were found to be. 
Shot. 
Chains. 
Links. 
I. . 
. . 11. 
39 . or 
nearly 7^2 Feet. 
II. . 
. . 10. 
38. 
685. 
III. . 
. . 11. 
1 7. 
737- 
IV. . 
. . 11. 
10. 
73 3. 
■ 1 ' - — r — - -I,. ■ ■■ ■ ■ 
* Supposing 14 Ounces 11 Penny-weight and 15 Grains and an half. 
Troy , equal to 1 Pound Avoirdupois. 
A a 2 la 
\ 
