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Wooden Crystal Models - Tetrahedral
Physical Description
These crystal models are composed of a lightly colored Pearwood. Each model is precisely shaped with correct angles to illustrate various examples of seven different groups of crystal structures: isometric, tetragonal, hexagonal,…
Richter Drafting Set
Physical Description
This Richter drafting set has an original wooden case covered in a thin black leather and shaped with brass wire. The top of the case is stamped in gold with a company logo reading: “Pracision|E.O. Richter & Co; Arctic Coal…
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…
Agate Mortar and Pestle (2/3)
Physical Description
There are three unique agate mortar and pestles at A.E. Seaman Mineral Museum. The second largest mortar measures two and one half centimeters in diameter at the base, while the matching pestle measures five centimeters in…
Agate Mortar and Pestle (3/3)
Physical Description
There are three unique agate mortar and pestles at A.E. Seaman Mineral Museum. The smallest mortar measures two centimeters in diameter at the base, while the matching pestle measures four centimeters in length. This mortar and…
Agate Mortar and Pestle (1/3)
Physical Description
There are three unique agate mortar and pestles at A.E. Seaman Mineral Museum. The largest mortar measures three centimeters in diameter at the base, while the matching pestle measures five centimeters in length. This mortar and…
Wooden Crystal Models - Orthorhombic
Physical Description
These crystal models are composed of a lightly colored Pearwood. Each model is precisely shaped with correct angles to illustrate various examples of seven different groups of crystal structures: isometric, tetragonal, hexagonal,…
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…
Secohmmeter (inductance measurement)
April 2021: this device has been reidentified as a secohmmeter and will be updated with information soon. Exciting find!
Physical Description: Rectangular brass box with removable lid on top of black iron base. Brass box is mostly hollow. A shaft…
Portable Galvanometer
Physical DescriptionObject comes in a wooden box. Box has a hinged lid and can be locked. Lock is made of metal with two screws on the face holding it to the side of the box. A leather strap is attached to the side of the box by the lock. There is a…
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…