272 THe MICROSCOPE. 
noidiscus Ehrenbergii, the frustules or which had been electro-plated 
with gold by Dr. A. Y. Moore of Cleveland. The slide was not only 
strikingly beautiful, as seen under the binocular microscope with a 
-inch objective, but the plating process was evidently of value in 
rendering the markings more distinct. In this particular case, the 
true elevation of the radial costze was much more obvious than 
in the natural diatom. 
AMERICAN POSTAL MICROSCOPICAL CLUB. 
WE are in receipt of the mailing box “ C” of the Club, which 
contains a handsome slide of Basalt from Schlusselberg, Bohemia. 
It was prepared and contributed by Prof. H. C. Lewis of Philadel- 
phia. It was made thin by grinding with emery. It is a fine 
specimen and full of interest, with high and low objectives. 
Slide No. 2 contains a section of the injected lung of a cat, 
stained just enough in haematoxylon to bring out the cellular ele- 
ments in detail. 
Slide No. 8 is a transverse section of the Bacura Root, that 
was cut in paraffine with a microtome by W. H. Walmsley, and 
like all slides prepared by this gentleman, they show the perfec- 
tion of his work. 
Slide 4 is a good exhibit of moss, and shows the confervoid 
filaments and gemmal both growing from the axils of the leaves. 
The specimen is worthy of careful study, in order to bring out the 
points that are interesting. 
Slide No. 5, presented by Dr. G. S. Rex of Philadelphia, 
represents the threads or elaters of “ Trichia Crysospherma,” a 
species of the Myxomycetous Fungi or Slime Moulds. This spe- 
cimen shows better than any other, the true character of the spinal 
threads which have been the subject of discussion among micro- 
scopists. A + objective brings out the elaters plainly and shows 
the distinguishing features between this and the chrysospherm, viz., 
the strize running parallel to the walls of the threads. 
Slide No. 6 is an interesting test for the higher powers of objec- 
tives and consists of the hair of the bat. 
Tur Central New York Microscopical Club held a soiree 
November 24, at Greyhound Hall, Syracuse, N. Y. A large num- 
ber of interesting objects were displayed. 
