FEBRUARY 23, 1912] 
in the charge of Professor Perret during the 
past summer. 
Proressor F. O. Grover, head of the depart- 
ment of botany of Oberlin College, devoted a 
portion of the summer recess to work on Mon- 
hegan Island, Maine, where he discovered sev- 
eral unknown plants and extended the known 
distribution of other species. His most im- 
portant find was a specimen of Carex crinita 
portereit, which has not been seen by botanists 
since its discovery at Moosehead Lake in the 
early seventies. 
Proressor Ericu von Dryeatsxt, of Munich, 
leader of the German South Polar Expedition, 
has been entrusted by the Prussian Academy 
of Sciences with the continuation of the ex- 
plorations in China begun by the late Pro- 
fessor Ferd. von Richthoven. 
Dr. Marcus Bengamin, of the U.S. National 
Museum, has been appointed by the president 
to serve on the Assay Commission that meets 
in Philadelphia on February 14. 
Unpber the auspices of the College of Sci- 
ences, a series of lectures will be given at the 
University of Illinois by Professor W. Johann- 
sen, of the University of Copenhagen, on 
“ Modern Problems of Heredity.” These lec- 
tures will be given from February 26 to March 
9, 1912. The first lecture at the University of 
Illinois will be an introductory one on such 
topics as “The Primitive Conception of 
Heredity.” “‘ Transmission’ of Personal 
Characters,” ete. The second on “The Prin- 
ciple of Pure Lines.” The third lecture, 
“Mendelism.” The fourth, “Complications 
and Exceptions.” The fifth, “Mutations.” 
The sixth lecture, “ Continuity or Discontinu- 
ity in Evolution.” From March 4 to 10 a 
series of five or six lectures will be given, also 
under the auspices of the College of Science, 
by Professor W. Kukenthal, of the University 
of Breslau. 
On January 16 Professor W. Bateson began 
a course of six lectures at the Royal Institu- 
tion on “The Study of Genetics.” 
Proressor V. VOLTERRA, of the University 
of Rome, is giving a series of lectures at the 
University of Paris on the extension of the 
SCIENCE 
297 
theory of functions, the integro-differential 
equations and integral equations, with appli- 
cations. 
THE Moissan memorial lecture before the 
London Chemical Society will be delivered 
by Sir William Ramsay, on February 29. 
Proressor W. JOHANNSEN, of the University 
of Copenhagen, gave an address on “ Prob- 
lems of Heredity” before the Minnesota 
chapter of Sigma Xi on the evening of Feb- 
ruary 10. 
Proressor A, V. Biermincer, of the Univer- 
sity of Illinois, delivered a series of lectures 
on the theory and technology of clays and 
other silicates, before the classes in economic 
geology of the University of Chicago, January 
22-977, 
Dr. W. A. Hewet, professor of Greek at 
Wesleyan University, gave an address on 
“The Beginnings of Science” before the 
Middletown (Conn.) Scientific Association 
on February 13. 
Epwarp M. East, assistant professor of ex- 
perimental plant morphology, Bussey Insti- 
tute, Harvard University, lectured at Trinity 
College on the evening of February 16 on 
“Influences of Recent Advances in Biology 
in the Art of Plant Breeding.” 
Proressor M. A. Rosanorr, of Clark Uni- 
versity, lectured on February 1 and 2 before 
the industrial research fellows at the Uni- 
versity of Pittsburgh on “The Partial Vapor 
Pressures of Liquid Mixtures.” 
Mr. Haro~p Parker, on February 9, de- 
livered a lecture on “Contracts and Specifi- 
cations” before the graduate students in 
highway engineering at Columbia University. 
Tue senior class of the Colorado School of 
Mines has recently been given addresses by 
professional men of Denver. Mr. Frank E. 
Shepard, president of the Denver Engineer- 
ing Works Co., spoke on “ Modern Mill Prac- 
tise” and on “ Modern Mill Plant Design ”; 
Mr. John C. Traylor, of the Traylor Engineer- 
ing Works, spoke on “Jigging,’ and Mr. W. 
H. Trask, consulting engineer for the Cen- 
