DescriptionLetter signed David Melville, Washington City, to Thomas Jefferson, Monticello, Virginia, January 23, 1822.jpg
English: States that lighthouses are rendered almost useless in the winter when they are needed most due to the congealing of the oil which causes the lights to go out. Melville has an invention "by which the oil is kept warm by the heat communicated to it from the flame of the same lamp." Title: Letter signed David Melville, Washington City, to Thomas Jefferson, Monticello, Virginia, January 23, 1822
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Missouri History Museum. Letter signed David Melville, Washington City, to Thomas Jefferson, Monticello, Virginia, January 23, 1822 1000to1859 #581.4 of 595
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