327. Find the fifth root of '0856329.
328. Find the 19th root of ⚫00123456.
329. Find the 08th root of '08.
330. Find the 0065th root of ⚫16235.

Ans. 611685. Ans. 7029546.

331. Find a fourth proportional to 8352, 3.69, and 30.57.

Ans. 013506.

332. Find a fourth proportional to 8.37, ⚫0084321.

5, and

Ans. 00148897.

341. Find the value of (£32 16s. 7 d.) x (1.015)50.

Ans. £69 2s. 4 d.

A TABLE OF SQUARES, CUBES, AND ROOTS.

TABLE OF SPECIFIC GRAVITIES.

THERMOMETER Fahrenheit 60°, Barometer 30 inches.

A cubic inch of water, at the temperature of 60°, weighs 250.508 grains in air and 252-818 grains in a vacuum.

A cubic inch of air

weighs 3101 grains.

NOTE. Since a cubic foot of pure water, at the temperature of 600, weighs 998-559, or nearly 1000 ounces avoirdupois, in a vacuum; if the decimal points be removed from the numbers in this table, the number opposite to each substance will nearly represent the weight of a cubic foot in ounces.

Thus the weight of a cubic foot of steel, hard, is