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Search results: 4 matches found for silver
  1. Vacuum Flask — 2023-10-09 23:46:28
    …e used equally well to keep liquids for consumption hot as well as cold. It had double walls with a vacuum between and silvering on the inner walls helped to reflect heat. He was knighted in 1904 and died on March 27, 1923. == Cordite == Dew…
  2. Photography — 2021-08-14 19:57:18
    …a useful negative. The image on this negative was then fixed with a chemical solution. This removed the light-sensitive silver making it safe to view the picture in bright light. With the negative image, Fox Talbot found he could then repeat the …
  3. Light Bulb — 2021-08-09 21:56:27
    …mbered for his contribution to photographic developing processes. He noticed that heat increased the sensitivity of the silver bromide emulsion. He later patented bromide paper, developments of which are still used for black and white photographi…
  4. Pound Sterling — 2016-05-31 15:19:41
    … === The King of Mercia [[England]], in the latter half of the 8th Century, began the minting of the earliest English silver pennies. The pound was divided into 20 shillings and 240 silver pennies. == Story behind Sterling == {{Image url="Libr…
    …and the abbreviation for the unit of mass, lb (pound) because its value originally equated to the price of a pound of **silver** not gold. {{Image url="CoinShield.gif" class="right" title="Coin Shield" width="300" }} The reverse of the modern c…

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