collier.] TIN ORES IN THE UNITED STATES. 45 
In Connecticut tin ore has been found at Haddam, but only as a 
mineralogical curiosity. 
In Georgia tin ore has been reported from Lumpkin County as 
Occurring in granite and chlorite schists, with minute quantities from 
the gold washings. • 
In Idaho a few specimens of stream tin have been found on Jor- 
dan Creek, in the southwestern part of the State, and in the Coeur 
d'Alene district. 
In Maine" cassiterite occurs at Winslow in small veins, which trav- 
erse impure limestone, with purple fluorite, mica, quartz, and mis- 
pickel. These veins have been prospected to a depth of 100 feet, 
but have yielded no tin in commercial quantities. Similar occurrences 
are reported at Paris and Hebron. 
In Massachusetts a few crystals of cassiterite have been found with 
albite and tourmaline at Goshen and Chesterfield. 
In Missouri^ a small amount of cassiterite has been found replacing 
sphene in granite. 
In Montana b stream tin has been found in Prickly Pear, French 
Bar, and Ten Mile creeks, in the " Basin " in Basin Gulch and in Peter- 
son Creek. Light-brown, rounded pebbles of wood tin associated 
with topaz crystals have been found at one locality. 
In New Hampshire cassiterite was found at Lynn and Jackson in 
1840 by Doctor Jackson. It occurs with arsenical and copper pja-ites, 
fluorspar, and phosphate of iron in small quartz veins, and mica, slate, 
and granite near a trap dike. 
In South Dakota'' the Black Hills contain noteworthy deposits of tin 
ore, which, however, have not jet proved commercially productive. 
They occur in an area of coarse-grained granite in the central part 
of the hills. The Etta mine deposit, the only one that has produced 
any considerable quantity of tin, is a lenticular body of pegmatitic 
granite, which consists of quartz, feldspar (albite), lepidolite, and spod- 
umene in individuals of great size^ up to 8 or 9 feet in dimensions. 
Cassiterite occurs in association with lithia mica and is accompanied 
by columbite and tantalite, with which it is apt to be confused. The 
mine was sold to an English company, which erected a 250-stamp mill, 
but the ore did not prove profitable to work, and after the first run, 
which produced 9,385 pounds of tin, the work was closed. 
In Texas d tin has been discovered in quartz veins occurring in greisen 
granite in the Franklin Mountains near El Paso, and one small crystal 
a Jackson, C. T., On the discovery of a new locality for tin ore in Winslow, Me.: Proceedings Boston 
Soc. Nat. Hist., vol. 12, 1869, p. 267. Hunt. T. S., Remarks on the occurrence of tin ore at Winslow, 
Me.: Trans. Am. Inst, Min. Eng.,vol. 1, 1873, p. 373. 
& Raymond, R. W., Trans. Am. Inst, Min. Eng., vol. 1, 1873, p. 371. 
' c The writer is indebted to Mr. S. F. Emmons for the note on tin in South Dakota. 
dDumble, E. T., Second Ann. Rept. Texas Geol. Survey, 1890, pp. 595, 690, 713. 
