Brewers have several methods of expressing to what part they would have the worts reduced by boiling. _Brass_, is the technical appellation for the upper rim of the copper; it is a fixed point, from which the estimation generally takes place, either by inches, or by the nails, which rivet the parts of the copper together. These last are not very equal, either in the breadth of their heads, or their distances from each other. Inches then, though not specified on the copper, but determined by the application of a gauge, on which they are marked, claim the preference. The necessity of coppers being gauged, and the contents of what they contain on every inch, both above and below brass, must appear in a stronger light, the nearer we bring the art to exactness. The following tables will shew the most useful manner in which I conceive this gauging should be specified. _Gauges of Coppers._ Great Copper, set up Nov. 30, | Little Copper, set up Aug. 3, 1750. | 1753. | [23]B. F. G. | B. F. G. 17 15 3 4 Full | 15 11 2 7 16 15 2 1 | 14 11 1 5 15 15 0 5 | 13 11 0 3 14 14 2 8 | 12 10 3 1 13 14 1 4 | 11 10 1 7 12 13 3 7 | 10 10 0 6 Inches 11 13 2 3 |Inches 9 9 3 4 Above 10 13 0 6 |Above 8 9 2 2 Brass. 9 12 3 2 |Brass. 7 9 0 8 8 12 1 5 | 6 8 3 6 7 12 0 1 | 5 8 2 5 6 11 2 4 | 4 8 1 3 Current 5 11 0 8 | 3 8 0 1 4 10 3 3 Current | 2 7 2 7 of 3 10 1 7 | 1 7 1 5 2 10 0 2 of | Brass 7 0 5 Little 1 9 2 6 | 1 6 3 5 Brass 9 1 1 Great | 2 6 2 5 Copper 1 8 3 8 | 3 6 1 5 2 8 2 6 Copper | 4 6 0 5 Allowed. Inches 3 8 1 4 |Inches 5 5 3 5 Below 4 8 0 2 Allowed. |Below 6 5 2 5 Brass. 5 7 2 8 |Brass. 7 5 1 5 6 7 1 6 | 8 5 0 5 7 7 0 4 | 9 4 3 4 8 6 3 3 | 10 4 2 5 9 6 2 2 | 11 4 1 6