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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
Meridiograph
Louis Ross
"San Francisco, U.S.A."
Metal
1917 to 1927
Dia. = 17.4 cm
Surveying
Notes:
"1) Used to calculate true north from sun position measurements. 2) See Vol 25, No 1 pg 7-9 Journal of the Oughtred Society for a details about this slide rule."
Image 1
Image 2
Image 3
Image 4
