Personal and Scientific Nczvs. 1 2g 
Wolff, J. E. 
Preliminary description of the specimens of igneous rocks in the 
collections from the isthmus of Panama and Costa Rica, made by 
Kobert T. Hill. January, February, and March, 1895. (Bull. Mus. 
Com.p. Zool.. vol. 28. Geol. ser. vol'. 3, no. 5, pp. 276-281, June 1898.) 
PERSONAL AND SCIENTIFIC NEWS. 
The Hayden Memorial Geologtcal Award for 1898 
has been conferred, by the Academy of Natural Sciences of 
Philadelphia, on Prof. Otto Martin Torell, director of the 
Geological Survey of Sweden. The award consists of a bronze 
medal and the interest on the endowment fund. 
The following named gentlemen received the degree of 
Doctor of Philosophy at the Johns Hopkins University in 
June, presenting the theses indicated: 
Cleveland Abbe, Jr.: "The Rivers of Maryland With 
Special Relation to the Evolution of the Piedmont Topo- 
graphy." 
A. G. Leonard: '"The Basic Eruptive Rocks of North- 
eastern Maryland and Their Relation to the Granites." 
C. C. O'Harra: "The Geology of Allegheny County, In- 
cluding an Account of the Stratigraphy and Structure of the 
Central Appalachian Belt in ^Maryland." 
Dr. Abbe becomes professor of geology at Western Marv- 
land college, Westminster, Md. Dr. Leonard becomes a mem- 
ber of the Maryland Geological Survey. Dr. O'Harra be- 
comes professor of geology and mineralogy at the South Da- 
kota School of Mines. 
The International Mining Congress which met at 
Salt Lake city, in July, had an attendance of about 200, re- 
presenting mostly the mining states of the west, also Mexico, 
Peru, Canada, Venezuela and Australia. The next session 
will be held in 1899, at Milwaukee. One of the most im- 
portant objects of the congress is to recommend amend- 
ments to the mining laws of the United States. 
The National Geographic Magazine, Washington, 
issued a specially adapted number for Jul)', in recognition 
of the Washington meeting of the National Educational As- 
sociation. It contains valuable articles suited to the higher 
grade teachers, on American Geographic Education by W. 
J. McGee; Origin of the Physical Features of the United 
States, by G. K. Gilbert; Geographic Development of the 
District of Columbia, by W. J. McGee; Historical Develop- 
ment of the national capital, by Marcus Baker; Geographic 
