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Scientific American, Vol. 40, No. 3 (1879) (1879)

leaf 3

An illustration from Scientific American, Vol. 40, No. 3 (1879), 1879, leaf 3
as a conduct- clay determines the grade of hardness of the pencil when terior 11 miles more, the whole covering an area of over 30 ing coating for galvano-plastics. Its unchangeable character finished, the more clay the harder the ‘‘lead.” After the square miles. materials are mixed together the… … Men are manufactured by this frm, The company are the The grain is separated from the straw by 18 steam thrashers, only pencil manufacturers, we believe, that were awarded a which puts it in the bins at the rate of 1,000 bushels per: THE RAILROAD, WITH BUNDLES OF PENCILS, gold medal at the Paris…

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