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| Part of collection(s): | drawings, microscopes, camera lucida microscopes |
| Author/Artist: | Coghill, Will H./Bonardi, J. P. |
| Title: | -- |
| Description: | Flotation Concentrate Sketched by Means of the Camera Lucida. Minus 60, plus 80 Mesh. Magnification, 25 Diameters. In: Coghill, Will H./Bonardi, J. P.: Approximate Quantitative Microscopy of Pulverized Ores. Including the Use of the Camera Lucida. Washington 1919, U.S. Bureau of Mines, Technical Papers 211, Plate III |
| Year: | 1919 |
| Measures: | -- |
| Medium/Material: | Drawing |
| Location: | Library of Congress, Washington |
| Source/Literature: | show source |
