154 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 58 



SOUTH DAKOTA (Continued) 



1017. SCHAEFFEB, OKAS. A. Note on tantalite and other minerals, accom- 



panying the tin ore in the Black Hills. 



Trans. Amer. Inst. Mg. Eng., Vol. 13, 1884-1885, New York, pp. 231-233. 



The analysis of some ore from Etta mine which at first seemed like tin ore, but 

 proved to be tantalite. This report caused a great stir among mining men, thinking 

 Prof. Schaeffer intended to show that the supposed tin ore was tantalite. Such was 

 not the case. The specimen sent for examination was not sent as tin ore, but as an 

 unknown ore which proved to be the above-named mineral. 



1018. SIMMONS, JESSE. Review of South Dakota mining conditions. 



Mg. Rep., Vol. 50, 1904, Denver, p. 63, photos 3, 2700 words. 



" Illustrated description of the Black Hills gold and tin mines. Gives monthly 

 tonnage, treatment and value of the different ores." 



1019. . Tin mining, metallurgy and geology, Black Hills. 



Mg. Rev., May 25, 1906, Los Angeles. 

 Not available to the authors. 



1019a. . Tin in the Black Hills of South Dakota. 



Mg. World, Vol. 30, 1909, Chicago, pp. 925-926, sketch 1. 

 Extract: Mg. Journ. Railw. Comm. Gaz., Vol. 85, 1909, London, p. 703. 

 " A short historical review of tin mining in the Black Hills, with notes on the 

 geology of the district and the operations of the Harney Peak Company." 



1020. STBUTHEBS, JOSEPH, and PRATT, JOSEPH HYDE. Tin in South Dakota and 



Wyoming. 



Min. Res. for 1903, U. S. Geol. Surv., 1904, Washington, D. C., pp. 335-336. 



A new district has been worked for past two years, located partly in Lawrence 

 Co., South Dakota, and partly in Crook Co., Wyoming. Caseiterite occurs in peg- 

 matite greisen or altered granite, and is generally in the form of coarse granules, 

 although large masses of fine grains of the mineral are found between the schist and 

 porphyry. Ore has averaged 1 per cent of metallic tin, and concentrates have ranged 

 from 62.5 to 65 per cent of metallic tin. 



1021. THOMAS, JOSIAH, with notes by J. S. CHILDS. The Harney Peak tin 



deposits. 



Eng. Mg. Journ., Vol. 54, 1892, New York, pp. 512-514, 536. 



Reprint: Mg. Journ. Railw. Comm. Gaz., VoL 62, 1892, London, pp. 1182-1183. 



Editorial: pp. 1190-1191. 



Lodes occur in slate and schists surrounding Harney Peak, which is of granite. In 

 almost all instances lodes or ledges are either vertical or dipping away from the 

 granite. Lodes small but continuous, being from 1 to 3 feet wide composed princi- 

 pally of quartz. Gives description of various workings. No theory as to origin of 

 deposits. Ore will yield 40 pounds of black tin per ton, giving 73 per cent 

 metallic tin. 



1022. THURLOW, LORD. The Harney Peak tin properties. 



Mg. Journ. Railw. Comm. Gaz., Vol. 62, 1892, London, p. 907. 



Extracts from a report made after visiting deposits, the object of which was to 

 ascertain the amount of development done, inspect machinery, ascertain probable date 

 at which tin production on a commercial scale might begin. Report does not give 

 geographical or geological description. 



1023. TODD, J. E. Geology of South Dakota. Tin. 



South Dakota Geol. Surv. Bull No. 1, a Preliminary Report on the Geology of 

 South Dakota, '1895, Sioux Falls, pp. 149-150, pis. 5, figs. 2, map 1. 



Analyses of tin ore from veins contains 74.5 to 76.7 per cent tin which is higher 

 than that from other prominent localities. 



