1Petition of Jonathan Williams, Jr., to the Patent Board, 20 November 1792 (Jefferson Papers)
Northern Liberties of Philadelphia, 20 Nov. 1792 . Having been “formerly engaged in the business of refining and claying Sugar” in London, he requests a patent for a new multiaperture mold he has invented for claying and whitening refined sugar, as explained by the annexed memoir and figures. Maple sugar manufacture would benefit much by claying or whitening on the spot, which would greatly...