Marcu 15, 1901.] 
ada was instituted, to the present time. The 
price of the aboveis fifty cents. Copies may be 
obtained from the Librarian of the Geological 
Survey. H. M. Ami. 
THE CROTONS OF THE UNITED STATES.* 
THE United States species of Croton, as 
represented in the principal herbaria of the 
country, have been monographed by A. M. Fer- 
guson, formerly connected with the Missouri 
Botanical Garden, now at the University of 
Texas, whose paper, accompanied by ample 
analytic keys, and illustrations of all but the 
most commonly figured species, forms a rather 
thick octavo paper to constitute a part of the 
forthcoming ‘Twelfth Annual Report of the 
Missouri Botanical Garden,’ where the work 
was done. In addition to keys and synoptical 
headings, a citation of necessary synonymy and 
specimens examined, combined with short but 
clear descriptions, appears to ensure the easy 
understanding of the species of a genus that has 
always afforded a fair number of puzzles to the 
botanist. 
PROCEEDINGS OF THE AMERICAN ASSOCIATION 
FOR THE ADVANCEMENT OF SCIENCE. 
THE Proceedings of the 49th meeting of the 
American Association for the Advancement of 
Science, edited and published by the permanent 
secretary, L. O. Howard, make a handsome 
volume of 500 pages. The volume has asa front- 
ispiece a portrait of the late Edward Orton, who, 
it will be remembered, died before he was able 
to give the address of the retiring president at 
the New York meeting. The volume contains 
as usual the lists of past officers, the con- 
stitution of the Association and lists of mem- 
bers and fellows. There then. follow the ad- 
dress of the president, Mr. Grove Karl Gilbert, 
of the U. S. Geological Survey, and the pro- 
ceedings of the separate sections, including the 
addresses of the vice-presidents. The volume 
concludes with the reports of the secretaries 
and of the treasurer. It is gratifying to note 
that the membership at the time of the New 
York meeting was 1,921, as compared with 
* Ferguson, A. M. ‘ Crotons of the United States.’ 
(Printed in advance from the Twelfth Annual Re- 
port of the Missouri Botanical Garden.) Issued 
February 16, 1901. Pp. 41, pl. 28. 
SCIENCE. 425 
1,695 the year before. One rather unexpected 
result of the change in the time of the meeting 
from August to June has been a delay in the 
publication of the volume. Immediately after 
the adjournment of the meeting the members 
separated widely for their summer vacations ; 
those who did not go to Europe went into the 
field, and the secretaries of sections were among 
them. As a result it was impossible for the 
permanent secretary to get together the manu- 
script for a large part of the volume until after 
the return of the secretaries of sections and 
other members to their homes in the autumn. 
The volume was all in print, however, by De- 
cember and would have been distributed before 
January ist except for an accident in the 
bindery which again delayed the general dis- 
tribution. 
BOOKS RECEIVED. 
Proceedings of the American Association for the <Ad- 
vancement of Science, Forty-Ninth Meeting, held at New 
York, N. Y., June, 1900. L.O. HowARD. Easton, 
Pa., The Chemical Publishing Company. 1900- 
Pp. 409. 
Lecithoblast und Angioblast der Wirbelthiere. WHIL- 
HELM His. Leipzig, B. G. Teubner. 1900. . Vol. 
IV. Pp. 328. 
L’ Année biologique. YVES DELAGE. Paris, Schleicher 
Fréres. 1900. Pp. xxxi-+ 847. 
Report of the Census of Porto Rico for 1899. LIEUT.- 
Cont. J. P. SANGER. Washington Government 
Printing Office. 1900. Pp. 417. 
Electric Lighting. FRANCIS B. CROCKER... New York, 
D. Van Nostrand Company ; London, E. & F. N, 
Spon. 1901. Vol. II. Pp. vi-- 505. $3.00. 
Anatomy of the Cat. JAcoB REIGHARD and H. S. 
JENNINGS. New York, Henry Holt & Company, 
1901. Pp. xx + 498. 
SCIENTIFIC JOURNALS AND ARTICLES. 
The Journal of the Boston Society of Medical Sci- 
ences for January 15th contains ‘ Notes on the 
Occurrence of Anopheles Punctipennis and A. 
Quadrimaculatus in the Boston Suburbs’ by 
Theobald Smith, ‘Notes on Anopheles’ by 
Charles S. Minot, and ‘ Notes on Mosquitoes’ 
by F. P. Gorham. KE. R. Le Count presents a 
‘Report. on the Histologic Changes found in 
the Tissues of Animals Inoculated with Diplo- 
coccus Searlatinz (Class),’ stating that they 
differ from those noted in man by Pearce in 
