Six document facsimile reproductions of letters and paragraphs sent to the Viceroy of New Spain during early exploration of greater California; includes correspondence from early merchant Sebastian Vizcaino and Franciscan friar Fray Junipero Serra. Handwritten on documents 14, 16 and 17: "Photographed from the original preserved in the "Archive General de Indias" de Sevilla, under Royal Order dated Madrid December 26,th 1883 for Adolph Sutro, Esq. of San Francisco, California."

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A thorough inventory of research resources in American repositories, the Guide lists collections in the history of chemistry and chemical engineering, the chemical and pharmaceutical industries, and a number of related chemical process industries and businesses, from personal and professional papers of chemical scientists and engineers to business records of the chemical process industries.