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Scientific American, Vol. 66, No. 25 (1892) (1892)
leaf 3
ns of lampblack add 2 drops ——_———q3O650 of gold size and thoroughly mix. Then add 2% drops until it registers, neither can a second RECORD AN IMPROVED ORE SAMPLING DEVICE, of spirits of turpentine and mix. Apply with a thin The illustration represents an ore sampler arranged registry be made… … of air is formed faction. © 1892 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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