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Collection of pages from K&E catalogs for the 4185

Brunton Slope Chart

Description:

Catalog page from the 1915 catalog

K&E 4185 Brunton Slope Chart is a specalized cardboard slide rule for calculating "apparent dip" from "true dip".

History:

The 4185 was offered only in the 1915, 1916 and 1927 catalogs.