The practical and most expeditious method of determining the quantity of liquor necessary to cover the crown of a Copper, is, after the other dimensions are taken, to admit water into the Copper till the crown is barely covered, and then to draw off the water into some vessel of which the content is known.

Some experienced officers of the Excise prefer measuring the water as it is put into the Copper, and for this purpose they cause it to be poured in, by a barrel at a time, till the crown is nearly covered: then a kilderkin is emptied into the Copper, if necessary; and lastly, any number of gallons requisite, from a half-gallon measure.

Both these methods are in effect the same, and consequently it matters not which of them we employ ; although, perhaps the first has the advantage, if there be plenty of water on the premises, since, by opening the plug in the Copper-Back, we can with the greatest ease admit the exact quantity necessary.

Again, to prevent the great trouble of calculating, in the first instance, the content, for an inch deep, of each circle, whereof cross diameters have been taken, a Table of the Content of Cylinders, in ale, for one inch deep, to every diameter, in inches and tenths, from one inch to 210 inches inclusively, will be found highly serviceable, and which Table we shall now subjoin.

TABLE

OF

ALE GALLONS

(FOR ONE INCH DEEP)

In Cylinders from 1 inch to 210 inches in diameter, with all the intermediate tenths;

VERY USEFUL IN GAGING,

AND COMMONLY

CALLED THE TABLE OF CIRCULAR AREAS

FOR

A LE.

9.4662

9.4988

58 9.3691 9.4014 9.4338 59 9.6949 9.7278 9.7608 9.7938 9.8268 60 10.0264 10.0598 10.0933 10.1269 10-1605 61 10-3634 10.3974 | 10-4314 10-4655 10-4997 62 10-7059 10-7405 10-7751 10.8098 10.8445 63 11.0541 11.0892 11∙1244 11·1596 11.1949 64 11-4078 11.4434 11.4792 11.5150 11.5508 65 11-7670 11.8033 11·8396 | 11·8759 11.9123 66 12-1319 12-1687 12.2055 | 12.2424 | 12.2794 67 12.5023 12.5397 12.5771 | 12·6145 12.6520 68 12-8723 12.9162 12.9542 12.9922 13.0303 69 13-2599 13.2982 13.3368 | 13.3754 13:4140 70 13:6470 13.6860 13.7251 | 13.7642 13.8034