James Watt in his Glasgow workshop improving on Thomas Newcomen's 1712 Newcomen
3588302 James Watt in his Glasgow workshop improving on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, from Les Merveilles de la Science, pub.1870. by French School, (19th century); (add.info.: James Watt in his Glasgow workshop improving on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781. James Watt, 1736 -1819. Scottish inventor, mechanical engineer and chemist. From Les Merveilles de la Science, published 1870.); Photo A© Ken Welsh; French, out of copyright.
© Photo © Ken Welsh / Bridgeman Images
Rust treatment. Brush being used to apply a rust removing mix of chemicals to a rusty spanner. Many commercial mixes of chemicals are available to remove rust (iron oxide). Most of them use strong acids, so skin contact should be avoided. If left, the acids will also corrode the original metal, so the chemicals should be washed off soon after use. If the rust has only affected the surface, the appearance of the original metal can be restored. However, if the rust has deeply corroded the metal, then scars and pits will be left in the metal. The use of an oil or wax coating will help prevent future cases of rusting.
© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
circa 1860: A smith hammers out a hunk of metal in his workshop, watched by an anxious woman. Beside him stands a finished breastplate. (Photo by Rischgitz/Getty Images)
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3068193, Black And White, Black White, Blacksmith, Craftsman, Female, Format Landscape, Furnace, H 129798 No Neg, H Ind Armaments Pre 1699, Hammer, Male, Roles And Occupations, Roles Occupations, Tool, Workshop