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BULLOCH LITHOLOGICAL MODEL

SERIAL NUMBER: 139

According to the American Geologist Journal, this was the first purpose made petrographic microscope made in the U.S.A. It is identical to number 138 in this collection, except for the special fittings on the nosepiece for petrographic use; No 138 had the same substage with swing out polarizer. An illustration of this first petrographic model with all the accessories identified is also on this site.