A folder containing instructions for use and chart and graph showing data for making out brass templates relating to speical Allbrit radial planimeter (square root type) U 2339 F for use with Electroflo Circular Record charts Nos. 1282, 1320, 1423 and 1434.

Details

Extent:
240
360
Identifier:
STAN3/18/38
Access:
Open Access

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