- This German silver and steel instrument has a white celluloid measuring wheel and vernier. It is in the general style of an Amsler fixed-scale planimeter, but it has no registering dial. The 4" tracer arm and 6" pole arm are connected by a hinge and form a circle around the measuring wheel when the instrument is closed. The cylindrical weight is screwed to a short revolving arm that is screwed on top of the pole arm. The lengths of the arms are not adjustable.
- A wooden case covered with black leather is lined with black velvet. White trim is around the inside edges of the case. A small piece of paper glued inside the bottom of the case is marked: 0.01 [square] in.
- There is no mark for a maker or distributor, but this instrument closely resembles a planimeter sold by the Eugene Dietzgen Company in 1926 as model 1800 for $17.75. Compare to MA.318485.
- The instrument was received at the Smithsonian in 1989.
- Reference: Catalog of Eugene Dietzgen Co., 12th ed. (Chicago, 1926), 180.
- Currently not on view
- Object Name
- date made
- ca 1930
- Physical Description
- german silver (overall material)
- steel (overall material)
- plastic (overall material)
- wood (overall material)
- leather (overall material)
- fabric (overall material)
- paper (overall material)
- case: 5 cm x 18.2 cm x 5 cm; 1 31/32 in x 7 5/32 in x 1 31/32 in
- ID Number
- accession number
- catalog number
- Credit Line
- Gift of LaVerne Watkins
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Data Source
- National Museum of American History
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