A TABLE

Containing the Weight of a Square Foot of Malleable Iron, Copper, and Lead, in lbs. Avoirdupois from to inch in thickness, advancing by

For finding the Weight of Malleable Iron, Copper, and Lead Pipes, 12 inches long, of various thicknesses, and any diameter required.

RULE.-Multiply the circumference of the pipe, in inches, by the numbers opposite the thickness required, and by the length, in feet; the product is the weight, in avoirdupois. lbs., nearly.

EXAMPLE. Required the weight of a copper pipe 12 feet long, 15 inches in circumference, and of an inch in thickness.

.7258 × 15 = 10.817 × 12 = 130.644 lbs. nearly.

A TABLE

Of the Weight of a Lineal Foot of Round and Square Bar Iron, in Avoirdupois lbs. from 3 to 6 inches, and advancing by an .

A TABLE

Of the Weight of Cast-iron Balls, in Pounds Avoirdupois; from 1 to 12 inches diameter, and advancing by an eighth.

Inches. Lbs. & Parts. Inches. Lbs. & Parts. || Inches. Lbs. & Parts.

A TABLE

Of the Weight of Cast-iron Pipes 12 inches long, in lbs.

NOTE. The first column is the width of the pipes, expressed in inches and parts of an inch; and the remaining columns are the weights of the pipes, under the different thicknesses in which they are placed.

N.B-Two flanges are generally reckoned equal to one foot of pipe.

Proportions of Cement for Cast Iron.

To sixteen parts of cast iron borings add two parts of sal-ammoniac and one part flour of sulphur.

When to be used, take one part of the above and twenty parts of borings, which mix with water to a proper consistence.

Of the Specific Gravity of Water at different Temperatures, that at 62 being taken us unity.

The difference of temperatures between 62° and 39° where water attains its greatest density, will vary the bulk of a gallon rather less than the third of a cubic inch.