1. English, 1867.
Sulphurets: | What They Are | How Concentrated, How Assayed, | And How Worked: | With A Chapter On The | Blow-Pipe Assay Of Minerals. | [rule] | By Wm. Barstow, M.D. | [rule] | San Francisco: | A. Roman And Company, | 11 Montgomry Street.

12°: [1]-120 p.

Contents: [1-2], Title page, verso "Entered according to Act of Congress, in the year 1867, | ..."; [3]-4, "Preface."-dated 25 October 1867.; [5]-8, Table of contents.; [9]-114, Text.; [115-116], Blanks.; 117-118, "List Of Valuable Works On | Mining, Assaying, Etc., Etc."; 119-120, Advertisements.

Very scarce. The object of this small work is to give the reader some idea of sulfur containing minerals and how they are assayed. It was written for mining personnel, mineralogists, prospectors, and others. The largest part of the text describes the assay process of sulphurets. A section at the end is on the blow-pipe analysis of ores.

Bibliographical references: NUC.