254 Scientific News. [ April, 
LaBoratory Worx 1N Microscopy. — Two of the summer courses 
of instruction in science at Harvard University, this summer, will in- 
clude laboratory work with the microscope, and special instruction in its 
use in botanical study, the preparation and preservation of objects, etc. 
No higher guarantee of the excellence of this instruction can be given 
than is implied in the fact that the course on Phænogamic Botany is to 
_be given by Prof. Geo. L. Goodale, and that on Cryptogamic Botany by 
Prof. W. G. Farlow. Each course is of six weeks’ extent, and is open 
to applicants, at a fee of $25. 
PriIntED Lasers. — Mr. F. F. Stanley of 40 Pearl Street, Boston, 
Mass., having made arrangements for the printing of his labels of proper 
size and style for the usual 3x1 slides, will supply the labels for the ac- 
commodation of any microscopist, at the cost of twenty-five cents per 
one hundred labels of any desired subjects. Labels to match, giving 
name of preparer, can be furnished at the same price in quantities of not 
less than one hundred of a kind. 
Seconp-Hanp Microscopes. — Any microscopist desirous of ob- 
taining a first-class Zentmayer binocular or a Beck Popular binocular, 
at a very low price, can hear of an opportunity by addressing the Editor 
of this Department. 
SCIENTIFIC NEWS. 
— The Harvard Natural History Society, an association of teachers 
and students at Harvard University, has offered prizes for essays on 
subjects connected with the natural sciences, by pupils in high schools, 
or schools of that grade, public or private. The first prize will be a sum 
of $25.00 and a collection of geological specimens and models. The 
second prize will be a sum of $20.00 and a collection of insects. For 
farther information apply to the secretary, George Dimmock, Cambridge, 
ass. 
— We have received a Preliminary Announcement of a Scientific Ex- 
pedition around the World, organized on rather an unique plan, to be 
conducted by a faculty of ten. There will be accommodations for sixty 
to eighty students. For farther information we would refer our readers 
to James O. Woodruff, Indianapolis, Ind., or Prof. W. L. B. Jenney; 
Chicago, Ill., or Prof. J. B. Steere, Ann Arbor, Mich. 
— At its last session Congress made an appropriation of $18,000 for 
a commission of three skilled entomologists to investigate and report on 
the ravages of the Rocky Mountain locust and to suggest means for 
their prevention ; to be appointed by the Secretary of the Interior. The 
commissioners have been appointed, and the board organized under the 
name of the United States Entomological Commission, with C. V- Riley 
president, A. S. Packard, Jr., secretary, and Cyrus Thomas treasurer. 
