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DAVY, Sir Humphry (1778-1829). Chemist and natural philosopher. Autograph Letter Signed to an unnamed correspondent, 2 pages 8vo (strengthened in the folds), 'Sunday Morg', no date. Asking his correspondent to supply some naptha (a chemical solvent) or to let Davy know where he could obtain some for an experiment. 'After trying a great number of chemical Bodies with the hope of confining & preserving the new preteus: like substances without perfect success, I have thought upon Naptha as a material that will probably answer my purpose. [No: 20375] The image is of the second page only.
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