868 
of a recent trip to the West Indies for the pur- 
pose of studying the economic fruits of the 
tropics. 
D. T. MAacDouGAt, 
Secretary pro tem. 
DISCUSSION AND CORRESPONDENCE. 
BIBLIOGRAPHY OF GEODESY. 
To THE EpiTor OF SCIENCE: In the Report 
of the United States Coast and Geodetic Sur- 
vey for 1887 there was published a _ Bibli- 
ography of Geodesy. Since the date named 
so many important contributions have been 
made to the literature of this subject that 
during the last meeting of the International 
Geodetic Association a resolution was passed 
requesting the undersigned to prepare a new 
edition of the Bibliography. 
This work is now well under way, and every 
possible effort will be made towards making it 
complete. This desirable end can be attained 
only with the assistance of those authors who 
are good enough to send as soon as possible 
titles of their publications to the address given 
below. 
As in the first edition, it is proposed to in- 
clude all papers, books and reviews, pertaining 
to geodesy, least squares, figure of the earth, 
density of the earth and gravity determina- 
tions, including theoretical discussions of the 
pendulum. 
In complying with this request, authors 
should give: : 
1. Full name. 
2. Complete title. 
a. If book, give size, number of pages in 
preface and in body of book, number of plates 
and illustrations, date and place of publication. 
b. If in a serial publication, give name of 
publication, volume, and year and pages occu- 
pied by the contribution. 
c. Ifareview, state the title of work reviewed. 
In case the work has been reviewed, give 
name of reviewer and where the review may 
be found. 
If preferred, in order to insure harmony in 
the form of making out the titles, publications 
may be sent to the undersigned. The Interna- 
tional Exchange Service of the Smithsonian 
Institution has graciously consented to transmit 
SCIENCE. 
[N. 8S. Von. XIII. No, 335. 
such works as may be forwarded with the object 
named in view. They should be sent in my 
name to the Smithsonian Institution,eWashing- — 
ton, D. C. 
By giving this their early attention, author 
will confer a favor upon the compiler and upon 
those who may find it necessary to consult the 
work when published. 
J. H. Gore. 
COLUMBIAN UNIVERSITY, 
WASHINGTON, D. C. 
SHORTER ARTICLES. 
NOTE ON THE WESTERN TERTIARY. 
THE recently published discussion on ‘The 
Freshwater Tertiary Formations of the Rocky 
Mountain Region,’ * by Professor W. M. Davis, 
in which he indicates published evidence to 
prove those supposed lacustrine deposits not to 
have deposited in large lakes, but rather in re- 
gions of lakes and rivers, explains well the 
Eocene deposits which I have seen in north- 
western Wyoming in the Bighorn basin. This 
region was visited by a party from the Uni- 
versity of Minnesota in the summer of 1899. 
The Eocene badlands there show an extent 
of horizontal strata which, when viewed as it is 
exposed for miles around one, does suggest at 
once a large filled lake basin. But there is a 
rapid alternation of clay and sand strata, and 
the several diverse kinds observed recur so un- 
equally, and yet often so monotonously that the 
theory of a large permanent lake does not 
suffice to explain the phenomena. In fact while 
exploring for fossils I had the impression that 
we were not beyond the supposed lake’s mar- 
ginal zone, even when 40 miles or more from 
the formational boundary, and came finally to 
believe that this freshwater Tertiary might be 
different from others of the West. Professor 
Davis’s argument now convinces me that it is 
not. 
In order to find fossils rapidly one had to 
search out what we called rivers and bogs. 
The former are shallow trough-shaped beds of 
sand occurring either as intercalated masses or 
as thickened parts of a regular stratum. The 
bogs occurred here and there, more or less 
* Proceedings Am. Acad. Arts and Sci., Vol. XXXV., 
p. 345. 
