- 
634 Scientifie News. [October, 
on the point of a pin a particle of the superfluous material which has 
collected at the edge of the cover, which should form, when cold, a 
globule perfectly hard and not at all sticky. 
OraQur-GLass SLIDES. — Mr. Carl Meinerth contributes to the 
Postal Club a slide having an opaque object mounted on a slide of white 
porcelain-glass. Some years ago Rev. E. C. Bolles suggested a similar 
use of black glass for white objects. Both methods make very hand- 
some slides, though for real usefulness we prefer the ordinary slides, as 
there is scarcely an object on which it might not at some time be desired 
to pass light through the glass, while a dark background can always be 
easily secured. 
EXCHANGES. — Diatomaceous material containing triceratium wanted 
in exchange for mounted specimens. Address G. C. Morris, E. Tulpe- 
hocken St., Germantown, Philadelphia. 
“ Plumule ” scales of small cabbage butterfly (Pieris Rape), mounted, 
for good slides. Address Edward Pennock, 805 Franklin St., Philadel- 
phia. 
SCIENTIFIC NEWS. 
— As the close season for salmon commences August 1st and extends 
to November Ist, no more of these fishes will be on sale while they are 
spawning inour rivers. The law is very stringent against their sale dur- 
ing the season, and makes it a misdemeanor to catch, sell, or have them 
in possession. — San Francisco paper. í 
— Dispatches of July 2d state that plentiful rains have fallen lately m 
the famine-stricken districts of Northern China, and the crops are m 3 
flourishing condition. Locusts have, however, appeared in some parts 
and committed great ravages. 
—The Shepard Scientific Collections have recently been purchased 
by the authorities of Amherst College, at a cost of $40,000, a sum about 
one half their appraised value. These collections are three in number, 
a geological, a mineralogical, and a meteoric, The mineralogical oat 
tion is one of rare beauty and value, while the meteoric ranks as tno 
fourth in point of size and interest in the world. The college has ae 
secured some of the most important and valuable collections possessed Ki 
any university, either in this country or in Europe. These collection 
were taken to Amherst from New Haven in 1847, and although ran 
ited by Professor Shepard in the college cabinets at Amherst have In 
erto been the property of Professor Shepard. 
—Dr. A. B. Meyer, director of the Royal Zodlogical 
Dresden, announces his intention to publish figures of rare bir 
Museum of 
d-skeletons, 
. : in 
hitherto not at all or insufficiently figured. The work will be pare sls 
parts, containing ten plates each, at intervals of about three at. 
n 
The price of each part will be fifteen shillings, and the are pn 
—Messrs. A. O. Hume, C. H. T. and G. F. L. Marshall will $ 
