File:Letter signed David Melville, Washington City, to Thomas Jefferson, Monticello, Virginia, January 23, 1822, page 2.jpg

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Description	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
Date	23 January 1822
Source	Missouri History Museum URL: http://images.mohistory.org/image/282A4A34-B9AF-0281-7A03-4360E894D3BF/original.jpg Gallery: http://collections.mohistory.org/resource/179801
Author	Melville, David
Permission (Reusing this file)	NoC-US - No copyright - United States MHS Open Access Policy: You are welcome to download and utilize any digital file that the Missouri Historical believes is likely in the public domain or is free of other known restrictions. This content is available free of charge and may be used without seeking permission from the Missouri Historical Society.
Identifier InfoField	D01269
Part of InfoField	Thomas Jefferson Collection, ca. 1773-1961 (bulk 1779-1826)
Subjects InfoField	Lighthouses
Resource InfoField	179801
GUID InfoField	282A4A34-B9AF-0281-7A03-4360E894D3BF

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