Correspondence. 199 
nodular is from the Iieatl of Cabin creek, 23 miles south and east of 
Ekalaka, Custer county, in the Fox Hills formation; and the crystals 
about 25 miles from the mouth of Cedar creek, Dawson county, also 
in the Fox Hills formation. Only one piece was found in perfect crys- 
tals. This piece is a large radiating nodule. The crystals very much 
resemble the barite of South Dakota. They have a wine color and be- 
long to the orthorhombic system. riicir length is from 6 to 8 centimet- 
ers and about i centimeter thick. 
The kind principally found is nodular-radiated fibrous. Tlicir shape 
is spheroidal. A whitish blue color and a specific gravity of 4.7 nearly. 
Some of the nodules are from 5 to 10 centimeters in diameter and 3 
to 7 centimeters thick. 1 hey are quite abundant at the head of Cabin 
creek and always occur with selenite, in clay. One stratum was very 
productive and was traced for over a half mile. 
Several chemical analyses were made of the nodular barite with 
the following result : 
Analysis. 
BaO = 65.60 per cent. 
SO., — 34.32 per cent. 
Total = 99.92 per cent. 
The chemical analyses were made by Mr. Martin Jones, B. S., 
graduate student in mineralogy. j. p. kowe. 
Missoula, Mont. 
PERSONAL AND SCIENTIFIC NEWS. 
Dr. E. R. Buckley will gh-e a scries of lectures at Chicago 
I'nivcrsity on economic geology. 
Dr. W. S. Bayley has resigned the professorship of geol- 
ogy and mineralogy- at Colby College, Waterville, Elaine. 
Professor N. S. Shaler of Harvard University will spend 
the next fotir months abroad, traveling in Egvpt. Asia ^^linor 
and Greece. — Science. 
The Geological Survey of Canada has recently isstied a 
series of ten geological sheets, Nova Scotia, referring to part 
P. vol. 5, annual report for 1890-91, by Hugh Fletcher. 
Mr. Waldemar Lixdgren has returned from Australia, 
and is now in active charge of the new survey of the mining 
district of Cripple creek for the U. S. Geological Survev. 
Professor H. S. Willlvms has been offered and has ac- 
cepted the position of professor and head of the department of 
geology at Cornell University, Ithaca, N. Y. He left Ithaca 
and wont to Vale in 1892. 
