Claussen, Francis F. Letters, 1883 January-June. 9 items. Location: Misc:C. Native of Boston, Massachusetts, and an assayer at the United States Mint at New Orleans beginning in 1885. Dr. Benjamin Silliman, a chemistry professor, organized the Sheffield Scientific School at Yale University. Letters from Claussen to Silliman concern an investigation of the assayer's department; a visit by the Canadian metallurgist, James Douglas; mineral samples from the King Mine in New Mexico; and deposits of gold and other minerals in Honduras. Included are stock holdings of the Sulphur Company, the owner of an extensive deposit of sulphur. For further information, see online catalog. Mss. 1433.