158 
should be sent, on or before March 1, 1901, to 
the secretary, Miss Florence M. Cushing, 8 
Walnut street, Boston, Mass. 
As we have already announced the same As- 
sociation has offered a prize of one thousand 
dollars for the best thesis presented by a woman, 
on a scientific subject, embodying the results of 
her independent laboratory research in any 
part of the field covered by the biological, 
chemical and physical sciences. The board of 
examiners for the prize is as follows: 
Biological Sciences: Dr. William H. Howell, 
Johns Hopkins Medical School; Dr. William Trelease, 
Washington University ; Dr. Charles O. Whitman, 
University of Chicago; Dr. Edmund B. Wilson, Co- 
lumbia University. 
Chemical Sciences: Dr. Russell H. Chittenden, 
Yale University; Dr. John U. Nef, University of 
Chicago ; Dr. Ira Remsen, Johns Hopkins University: 
Dr. Theodore W. Richards, Harvard University. 
Physical Sciences: Dr. Car] Barus, Brown Univer- 
sity ; Dr. Albert A. Michelson, University of Chicago; 
Dr. Edward W. Morley, Western Reserve University; 
Dr. Arthur G. Webster, Clark University. 
THE International Mining Congress will meet 
at Boise, Idaho, in July of the present year. 
ACCORDING to arecent bulletin of the Census 
Bureau, the center of population of the United 
States is now latitude 39.9.36; longitude, 85.- 
48.54, having moved westward about fourteen 
miles and southward about three miles since the 
last census. 
THE British Medical Journal states that Pro- 
fessor Claudio Fermi and Dr. Tonsini, of Sas- 
sari, have recently reported the results of ex- 
‘ periments in the prophylaxis of malaria made 
by them in the island of Asinara, off the north- 
west coast of Sardinia. They succeeded in de- 
stroying the Anopheles larve by means of 
petroleum poured into the pools of the island. 
This was repeated twice amonth. The process 
was begun in June and continued until the end 
of November. The mosquitoes in the air were 
destroyed inside houses by means of a mix- 
ture of powdered pyrethrum, chrysanthemum, 
valerian, ete., and the zanzolina of Celli and 
Casagrandi. In the dormitories of prisons, 
when there was nothing better available, chlo- 
rine, generated by treating calcium chloride 
SCIENCE. 
[N. S. Von. XIII. No. 317. 
with sulphuric acid, wasemployed. Protective 
nettings were applied to windows. The result 
was that hardly any Anopheles were found in 
any dwelling, while Culex pipiens was much 
scarcer than in former years. Notasingle case 
. of primary malaria was observed. 
THE Wisconsin Geological and Natural His- 
tory Survey has in press two bulletins of its 
economic series. One of these is the first part 
of a report on the clays and clay industries of 
the State and is by Dr. E. R. Buckley, assistant 
superintendent of the Survey. The other, writ- 
ten by Professor U. S. Grant of Northwestern 
University, deals with the copper-bearing rocks 
of the northern part of the State. It is ex- 
pected that these bulletins will be issued in 
January, 1901. 
WE quote the following editorial note from Na- 
ture: ‘‘A few weeks ago the new anthropological 
collections in the American Museum of Natural 
History in New York were opened to the pub- 
lic, and these valuable collections now occupy 
five halls, and others are being provided. We 
learn from our contemporary, SCIENCE, that the 
accessions to the anthropological collections of 
the museum obtained during the last three years 
have largely been due to extended scientific re- 
search undertaken by the institution. In this 
respect the methods of the American Museum 
of Natural History differ considerably from 
those pursued by a number of other institu- 
tions. It has not been the policy of the mu- 
seum to accumulate rapidly and indiscrimi- 
nately more or less valuable specimens collected 
on trading expeditions or purchased from deal- 
ers; but an endeavor has been made to build 
up representative collections and to obtain at 
the same time the fullest and most detailed 
information in regard to specimens, so that 
each addition to the exhibit of the museum can 
be made thoroughly instructive and will repre- 
sent a material contribution to science. There 
is no doubt this is the best way to build up a 
museum, and it is to be deplored that the 
various museums of the British Islands do not 
follow the example so worthily set by this and 
other American museums. Our English method 
is rather to wait like a spider in its web in the 
hope that something will eventually be caught; 
