flat plane Thorp gratings

Made:
1902
maker:
Thomas Thorp and Thomas Thorp and
flat plane Thorp gratings, 5

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flat plane Thorp gratings, 5
Science Museum Group
© The Board of Trustees of the Science Museum

flat plane Thorp gratings, 5.5 cm x 8 cm, 14,438 lines per inch, one of two, prepared by T. Thorp himself in 1902.

Details

Category:
Optics
Object Number:
1935-152/1
Materials:
glass and celluloid (cellulose)
Measurements:
overall: 100 mm x 75 mm x 4 mm, , .07kg
type:
plane - tool
credit:
Mr. C.W. Gamble.