Browse Items (74 total)

Physical Description The dip needle is a steel cylinder with two glass faces, a worn brass lifting ring, and a worn brass chain holding a steel rod inserted into the main of the dip needle at about 1 o'clock. There is hand scratched engraving of "M |…

Physical DescriptionThe metallograph sits atop a metal desk to which its frame is attached with two steel rods. The desk, which was sold with the instrument, contains shock-absorbing pillars that allow imaging in settings where mechanical vibrations…

Physical Description The Reflection Goniometer sits on a fix iron tripod with brass adjustable feet. Everything from the tripod up, would be made of brass. A disc (A) sits atop the center of the tripod is a circular scale with graduations from 0 to…

Physical Description The balance consists of a cast aluminum framed case with glass windows on the front, back and sides sitting on small brass feet. The front window of the case is a vertical sliding panel. The balance sits on a black glass base.…

Physical Description The spectrophotometer consists of four sections; a screen, a touchpad, a glass sample bay, a light bay, and a power control section. The spectrophotometer is similarly built to an early computer with the processing system as a…

Physical Description The calculator generally comprises three main parts: the main housing, the keypad, and the output carriage.The main housing for the calculator is rectangular as seen from the top, with one pale green slanted face on the front…

Physical Description A brass pressure gauge testing apparatus kit inside a fitted wooden case. The kit consists of a wooden base, brass cylinders, a reflective metallic weigh plate, four bolts, an oil pan, two notepads, and a steel wrench. The main…

The data on this card was a mature version of the "MTM" or "Methods-Time Measurement" movement pioneered by Herold Bright Maynard, John Lenhard Schwab and Gustave James Stegemerten in the early twentieth century. These men built on the fundamental…

A white plastic protractor connected to a right angle square, allowing for dimension and angle drawing. The window below the protractor is has slightly non-parallel long edges that diverge at about 2-3˚. Design patent no. 93,979—meaning it was…