To James Somerville
Philadelphia Dec. 1. 1791
I am to acknolege the receipt of your favour covering one of Keith’s pamphlets on Weights and measures, which contains a great deal of information on the subject. With my thanks be pleased to accept assurances of the regard with which I have the honor to be Sir Your most obedt. humble servt,
Somerville’s letter of 22 Nov. 1791, recorded in SJL as received 22 Nov.1791, has not been found. George Skene Keith’s Pamphlet: Tracts on Weights, Measures, and Coins (London, 1791). See Sowerby, description begins E. Millicent Sowerby, comp., Catalogue of the Library of Thomas Jefferson, Washington, 1952–1959, 5 vols. description ends No. 3766. TJ subsequently disparaged this work, critical of his advocacy of the rod pendulum as a standard of measure, as vague and imprecise (TJ to David Rittenhouse, 8 June 1792).