"Adder", adding machine patented 1889
"Adder", adding machine patented 1889
- Measurements:
-
overall: 8 mm x 160 mm x 108 mm, 0.394 kg
- Materials:
- silver (metal)
- Object Number:
- 1933-360 Pt1
- type:
- adding machine (stylus)
Webb's "Adder", patented 1889, with cover
- Made:
- 1889-1900
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
Webb's "Adder", patented 1889 with cover
Details
- Category:
- Mathematics
- Object Number:
- 1933-360
- type:
- adding machine (stylus)
- credit:
- Professor W.C. Unwin
Parts
Lid for Webb's "Adder"
Lid for Webb's "Adder", adding machine patented 1889
- Object Number:
- 1933-360 Pt2
- type:
- adding machine (stylus)
