TABLE OF CONTENTS.

WEIGHTS AND MEASURES:

Linear Measures.

Square Measures.

Cubic Measure.

Liquid Measure.

Dry Measure..

Weights..

Miscellaneous Measures..

Circular Measure

Metric System....

Weights of Water..

CONVERSION TABLES:

Measures of Length...

Measures of Area...

Measures of Volume.

Measures of Weight.

Measures of Pressure

Measures of Weight and Length
Measures of Weight and Volume.

Millimeters to Mils.

Mils to Millimeters.

Meters to Feet..

Feet to Meters..

Kilograms to Pounds Avoirdupois.

Pounds to Kilograms.....

Kilograms per Kilometer to Pounds per 1000 Feet.......

Kilograms per Square Millimeter to Pounds per Square Inch
Work or Energy.

Measures of Work..

AREAS OF CIRCLES:...

Areas of Circles in Circular Measures..

Areas of Circles in Square Measure..

WIRE GAUGES :

Areas in Square Mils for Various Gauges..

MISCELLANEOUS TABLES:

Degrees Centigrade to Degrees Fahrenheit...
Degrees Fahrenheit to Degrees Centigrade..
Decimal Equivalents of Parts of an Inch..

Temperature Coefficient of Constant Volume.....

Temperature Coefficient of Constant Mass and Length....
Additions to obtain Resistance at 20° C....

COPPER WIRE TABLES:

Brown & Sharpe Gauge, Metric Units.

Brown & Sharpe Gauge..

New British Standard Gauge..
Birmingham Wire Gauge..

SPECIFICATIONS FOR COPPER WIRE.

STRANDED COPPER WIRE....
Formulas for Strands..

Ordinary Galvanized Strand.

Siemens-Martin Strand..

High Strength Strand.

Extra High Strength Strand..

131

Table of Galvanized Strands.

131

RIVER CROSSING WIRE.

132

WEIGHTS AND MEASURES.

The fundamental units in United States measures are the meter and the kilogram.

These values define the inch and the grain, and are definite, made so by an executive order. All the values of the weights and measures in common use are derived from these values. The following are also fixed by law:

A liquid gallon

A bushel

= 231 cubic inches.

=2150.42 cubic inches.

In Great Britian there are two systems of weights and measures, the Imperial and the Metric. The relation between the two is fixed by law.

The English units of length are less than those in the United States by about three parts in one million. The English grain, and consequently the English measures of weights, are the same as ours. The English gallon is about one-fifth larger than ours, and the English bushel is about 3%. The following table shows the relative values of the units in Great Britian and the United States: