%86 Charges of greatest Efficacy for Artillery at Sea , 
Nature 
of 
Ordnance. 
Thickness of the Side of the Vessel, plus the Radius 
of the Ball. 
58 Inches. 
59 Inches. 
60 Inches. 
Pounder. 
12 
lbs. 
6-956308 
lbs. 
7-076244 
lbs. 
7-196180 , 
18 
9-342760 
9-503474 
9-664188 
24 
11-293814 
11-488535 
11-683256 
32 
12-680622 
13-916495 
14-152368 
36 
14-797884 
15-053028 
15-308156 
42 
16-400370 
16-683135 
16-965900 
In this Table the first column contains the nature of 
the ordnance, and the numbers in the other columns are 
their respective charges of gunpowder in pounds, when 
the thickness of the object to be destroyed is as specified 
at the top of the columns. If the thickness be given in 
inches, and parts of inches, take such parts of the differ- 
ence between the charge for the given number of inches 
and the next greater ; and add them to the charge first 
found for the given number of inches for the charge re- 
quired. 
The value of the decimal part of each will be had by 
multiplying it by 16, the number of ounces in a pound, 
and pointing off in the product from the right hand to- 
wards the left, as many places for decimals as are con- 
tained in the given decimal, and retaining the number on 
the left of the point for the ounces, increasing it by J, J, 
|, or 1, when the first figure of the decimal is S, 5, 7 or 
8 respectively. This hint is merely given for those prac* 
titioners who may not be very conversant in decimals. 
