Personal and Scientific News. 259 
PERSONAL AND SCIENTIFIC NEWS. 
Dr. T. C. Hopkins has been appointed to the chair of 
geology at Syracuse University. 
A Successor to Prof. J. M. Safford, at Vanderbilt • 
University, has been elected by the selection of Prof. L. C. 
Glenn, of South Carolina college. 
Mr. J. E. Spurr of the U. S. Geological Survey, re- 
turned to Washington, D. C. September 29th, from an exam- 
ination of the Monte Cristo mining diftrict in the Cascade 
mountains, Washington. 
Prof. Richard E. Dodge has spent the summer con- 
tinuing the geological stud)- of the region inhabited by the 
cliff dwellers in Arizona which he began a year ago for the 
Hyde Exploring Expedition in connection with the Ameri- 
can Museum of Natural History. 
Mr. Russell D. George has been appointed instructor 
in geology in the State University of Iowa, having charge of 
the work in mineralogy and petrology. Mr. George has 
been a graduate student in geology at McMaster University 
and at the University of Chicago. At the latter institution 
he was fellow in geologx' and later assistant in mineralog}- 
and petrology. 
The Tiffany Exhibit of American Gems and gem 
material at the Paris Exposition, which was gotten together 
and arranged under the direction of George F. Kunz, has re- 
ceived the highest commendation from the authorities of»the 
exposition and from visitors. After the close of the exposi- 
tion it is to be installed in the American Museum of Natu- 
ral History as the gift of one of the trustees. 
Prof. J. J. Stevenson spent the summer in Europe 
with his family. He attended the meeting of the Interna- 
tional Congress and made some special studies of the coal 
beds of France. Prof. J. F. Kemp spent most of the vaca- 
tion in an extended private geological investigatton in Brit- 
ish Columbia. Prof. R. P. Whitfield has returned to his reg- 
ular duties at the American Museum of Natural Histor}' af- 
ter a prolonged absence on account of sickness. His health 
seems to be completel)- restored. Dr. W. D. Matthew has 
returned from Europe, where he has been spending about 
four months in visiting and studying in the principal muse- 
ums and in attending the International Geological Congress. 
According to Prof. O. C. S. Carter, who recently visited 
the park of silicilied trees in Arizona, the tree trunks are fos- 
silized in a stratum of sandstone, probably of Cretaceous age. 
the Shinarump formation of Powell. The trees are all fallen, 
thus difYering from the erect trees found silicified in the Yel- 
