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Michigan Mining School Petrographic Slides
Physical Description: Two light-colored pine boxes with no cover or top feature slots for 36 individual glass microscope slides. The boxes do have empty spaces and they are glued together. There is no hardware on either box. The slides display thin…
Microscope Slides in Box
Physical Description
These microscope slides are contained in a lightly colored oak box, featuring thin cuts of wood and brass hardware. The locking mechanism on the front of the box is made up of two rotating hooks on each side, located near the top…
Model C-31 Vibration Pickup Calibrator and Exciter MANUAL
A 38pp. manual of operation for this instrument.
Monroe High Speed Adding Calculator (LA5-160x)
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…
Tags: 1900s, 20C, arithmetic, calculation, Calculator, Electricity, Mathematics, mechanism, Monroe
Newton Balance
The balance is contained in a cage of red-brown wood, atop a glossy black 20mm base made of either ceramic or stone, under which is larger red-brown colored base. Some scuff marks of normal wear and tear appear present on the front face as well as in…
Pantometer (Vernier Surveyor's Cross with Compass)
Physical description: A nickeled brass surveyor's cross in a wooden fitted case. The cross consists of a cylinder with a compass on the top and a gimbaled socket on the bottom for mounting on a stake or tripod. The main body of the instrument…
Pendulum Astrolabe
Physical Description: The instrument is situated on a gray base that is 34 cm long x 21.5 cm across x 1cm high. The object is able to rotate on this base to make the viewing of objects easier. The instrument consists of two eyepieces and two lenses,…
Picket Model 1000 Slide Rule
Physical Description: The Pickett 1000 slide rule is made of three rectangular bars of aluminum alloy coated in plastic with grooved slides. Two bars are connected at the end with braces that are mounted to the flat side of the bars and the third…
Tags: 20C, Calculator, Engineering, Mathematics, Pickett, Science, Slide Rule
Pickett Model N600-ES Log Log Speed Rule
Physical Description:
The Pickett Model N600-ES Log Log slide rule is constructed using three yellow painted aluminum bars. The “ES” in the model name means “Eye-Saver” and refers to the yellow painted construction. The two outer bars are called the…
The Pickett Model N600-ES Log Log slide rule is constructed using three yellow painted aluminum bars. The “ES” in the model name means “Eye-Saver” and refers to the yellow painted construction. The two outer bars are called the…
Tags: 20C, 20th Century, Eckel, Engineering, Mathematics, Mechanical Engineering, Pickett, Scale, Slide, Slide Rule
Featured Item
Wooden Crystal Models - Twins
Physical Description These crystal models are composed of a lightly colored Pearwood. Each model is precisely shaped with correct angles to illustrate…