Figs. 27, 28, 29.

Contents In Gallons Of The Frustum Of A Cone 27

To find the Contents in Gallons of a Vessel, whose diameter is larger at one end than the other, such as a Bowl, Pail, Firkin, Tub, Coffee-pot, etc.

rule. - Multiply the larger diameter by the smaller, and to the product add one-third of the square of their difference, multiply by the height, and multiply that product by .0034 for Wine Gallons, and by .002785 for Beer.

Example. - Required the contents of a Coffee-pot 6 inches diameter at the top, 9 inches at the bottom, and 18 inches high.

large diameter

9

small do.

6

54

1/3 of the square

3

57

height

18

456

57

Carried up

1026

brought up

1026

.0034

4104

3078

3.4884 Wine Gallons, or nearly 3 gallons.

1026 multiplied by .002785 equal 2.8574 Beer Gallons.