Name/Title
S02.03.020Description
Douglas L. Kohout using a petrographic microscope to study polished coal briquettes under reflected light. The photometer at the top of the microscope measures the "brightness" or reflectivity of the coal particles. A petrographic microscope is used to examine opaque substances such as pyrite, magnetite and most coal particles using reflected light or used to identify minerals using transmitted light. Douglas worked in the Regional Geology Section of the Ohio Geological Survey. This picture was taken in the geochemistry laboratory at the Grandview Avenue Offices. The image was taken by Philip J. Celnar in 1971.
The Ohio Department of Natural Resources, Division of Geological Survey's main office was located at 1207 Grandview Avenue, Grandview Heights, Ohio 43212 from 1962 through May 1973. The Geological Survey's offices were on part of the first floor and all of the second floor of the building. The Grandview office had x-ray, petrography, and geochemistry laboratories on the first floor. More informally, rooms with coal polishing equipment, microscopes, and other types of equipment were located in various spaces at the Grandview office.
Information about the history of the Survey's facilities is available in Survey Opens New Core and Sample Repository by Merrianne Hackathorn (Ohio Geological Survey, Ohio Geology Newsletter, No. 4, 1999).
This slide image included in the USGS National Digital Catalog for NGGDPP Grant G15AP00115 in FY2015.Context
Man sitting at a desk and looking through a microscope; other equipment in the foreground. Taken at the office in Grandview Heights, Ohio.