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Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. (1899)

Boyd, James Penny, 1836-1910 · Philadelphia, Pa., A. J. Holman & Co · leaf 209

An illustration from Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .., 1899, leaf 209
than electric current that he isolated (1807) the metals sodium and potassium,and described their properties. This achievement of Sir Humphry Davys was the second great step inthe progress of chemistry, after the one taken by Lavoisier. By means ofthe metals sodium and potassium other metallic…

Progress · Inventions

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