James D. Dana (1813-1895), editor of the American Journal of Science, sends James Curtis Booth (1810-1888) a copy of the Manual of Mineralogy, Dana's 1848 publication covering the basics of mineralogy and…

Edward N. Kent writes to James Curtis Booth (1810-1888) fretting that the position he applied to at the United States Assay Office may be filled politically.

Edward N. Kent writes to James Curtis Booth (1810-1888) with his decision to apply to the Assayer's position at the Unites States Assay Office in New York.

Edward N. Kent of the United States Assay Office at New York writes a follow-up from his letter of March 7 to describe the testing of his machine for sifting sweeps.

Edward N. Kent of the United States Assay Office at New York requests a supply of large acid pitchers.

Edward N. Kent of the United States Assay Office at New York submits an order for one dozen large acid pitchers.

Edward N. Kent of the United States Assay Office at New York discusses the installation of two coils for silver-drying closets.

Edward N. Kent of the United States Assay Office at New York solicits testimony to be presented before Congress as to the efficacy of his sweeps.

Edward N. Kent of the United States Assay Office at New York wishes to obtain fire-tile linings for furnace doors.

Edward N. Kent of the United States Assay Office at New York reports that the large wooden faucets in precipitating vats need to be replaced.

Edward N. Kent of the United States Assay Office at New York wishes to obtain six White German Porcelain refining pots.

Edward N. Kent of the United States Assay Office at New York discusses uses of mercury in gold refining.

Edward N. Kent of the United States Assay Office at New York contains a printing circular describing Kent's Patent Apparatus for Separating Gold as described in his letter of March 7, 1855.

Edward N. Kent of the United States Assay Office at New York criticizes a gold refining process of a Professor McCulloh (likely Richard Sears McCulloh, 1818-1894).

Edward N. Kent writes to James Curtis Booth (1810-1888) to solicit advice concerning the position of Assayer at the United States Assay Office at New York.

Edward N. Kent of the United States Assay Office at New York describes a machine he devised intended for sifting sweeps.

Edward N. Kent of the United States Assay Office at New York writes a continuation of his letter of March 6, expanding on the silver problem.

Edward N. Kent of the United States Assay Office at New York advises James Curtis Booth (1810-1888) on the purchase of some spar.

Edward N. Kent of the United States Assay Office at New York reports on the monetary value of sweeps.

Edward N. Kent of the United States Assay Office at New York thanks James Curtis Booth (1810-1888) for sending the description of improvements made to furnace doors.

Edward N. Kent of the United States Assay Office at New York discusses a possible problem regarding silver recovered from the sweeps.

Edward N. Kent of the United States Assay Office at New York writes to James Curtis Booth (1810-1888) with a need for two additional furnaces and discusses alterations made to the office.

Edward N. Kent of the United States Assay Office at New York expresses the hope that he will receive the patents for his sifting sweeps machine "very soon."

Edward N. Kent of the United States Assay Office at New York writes to inform James Curtis Booth (1810-1888) that he prefers to use hard-wood charcoal from New York rather than depend upon supplies from Philadelphia.

Edward N. Kent of the United States Assay Office at New York discusses brittle gold and cupel.