Illustration of steel square with hypotenuse drawn.

Steel Square

Illustration of steel square with hypotenuse drawn.

Illustration of steel square with bevel/slant.

Steel Square

Illustration of steel square with bevel/slant.

An instrument for indicating the pressure of the steam in a boiler.

Steam-gauge

An instrument for indicating the pressure of the steam in a boiler.

Illustration showing a survey on the lake front in Chicago with distances and angle measures shown.

Survey of Lake Front in Chicago

Illustration showing a survey on the lake front in Chicago with distances and angle measures shown.

"An instrument much employed in land-surveying for the measurement of angles horizontal and verticle." — Chambers, 1881

Theodolite

"An instrument much employed in land-surveying for the measurement of angles horizontal and verticle."…

For the builder or architect who wants to raise the standard of his work- who takes conspicuous pride in the accuracy of his efforts, this transit is especially designed.

Builders Transit

For the builder or architect who wants to raise the standard of his work- who takes conspicuous pride…

Illustration comparing the fundamental units of measure ounces to grams and pounds to kilograms.

Comparison Of Units Of Weight

Illustration comparing the fundamental units of measure ounces to grams and pounds to kilograms.