Five students are learning how to use scales to measure a book. They have balanced the book with some…
Transferring a setting between inside calipers and outside calipers.
Illustration comparing the fundamental units of measure 1 square yard and 1 square meter.
Illustration of steel square.
Illustration of steel square with hypotenuse drawn.
Illustration of steel square with bevel/slant.
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.
"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…
Illustration comparing the fundamental units of measure ounces to grams and pounds to kilograms.