Personal and Scientific Neivs. 5 7 
CORRESPONDENCE. 
Mourlons BibUographia Geologica. The attention of American 
geologists and teachers of geology having occasion to keep abreast 
with the literature of the science is called to the "BibUographia 
Geologica" issued by the Belgian Geological Survey under the direc- 
tion of M. Michel Mourlon, with the assistance of Dr. G. Simoens. 
This work, it should be ' stated, is a section of the Universal 
Bibliography which is being carried out upon the Dewey Decimal 
classification. 
Two series of volumes have been begun for geology and miner- 
alogy, one including all publications from January ist, 1898, the other 
works which appeared prior to that date. Two volumes of the cur- 
rent series B have been published and one volume of the retrospective 
series A. These catalogues are printed on one side of tlie page only 
so that the booklets may be cut up for a card catalogue if desired or 
may be bound as annual lists. With each entry is a Dewey decimal 
number giving an analysis of the subject-matter or brief title. The pa- 
pers in each volume are grouped according to the system by subjects. 
The Belgian Survey also issues a hand-book of the Dewey Deci- 
mal Classification to be used in the search for papers. The list of 
periodicals examined and listed in the Belgian office includes all of 
the regular and important journals, but there is a large number of pa- 
pers appearing in irregular channels or in new joiu-najs in this country 
to which the of^ce has not ready access. The undersigned as a vol- 
untary collaborator with M. Mourlon. will undertake to read and 
classify for the catalogue any papers or books not included in the 
"listes compulses'-' of the survey which may come to him. The publi- 
cations of the BibUographia Geologica are for sale at the Imprimerie 
Hayez, 112 rue de Louvain, Bruxelles, Belgium. The price of the an- 
nual catalogue is 8 francs. J. B. Woodwokth. 
PERSONAL AND SCIENTIFIC NEWS, 
Prof. A. Brigham, Colgate University, rettirned re- 
cently after a sojourn in Europe, having- visited England, 
Scotland. Germany, and Switzerland. 
A Large Collection of Devonian fossil fishes has re- 
cently been secured by the American Museum of Natural 
History from Ohio. According to Mr. Bashford Dean, 
(Science, Dec. 29) it is the fourth collection made by Mr. 
jay Terrell for whom Dr. J. .S. Newberry named Dinichthys 
terrelli, and contains an unusually fine and large specimen 
of that fish. 
