1902) MICROSCOPICAL JOURNAL. 41 
The advantages of the apparatus appear to be in its 
unfailing action. There are no small bores present, and 
only asmall quantity of ether is required, and the work- 
er, as against the use of the ether-spraying apparatus, 
runs no personal risk. Further, once the apparatus is in 
work it requires no attention, and one can leave the 
machine to itself, in which respect it is not inferior to 
the carbonic-acid apparatus.—Ice and Cold Storage. 
Notes on Microscopy. 
F. SHILLINGTON SCALES, F. R. M. S. 
C. BAKER’S New CaTALoevE.—Mr. Charles Baker has 
sent us his latest catalogue, which is an enlargement and 
revision of the previous issue. The arrangement of the 
contents might with advantage be copied by other makers. 
The first division contains particulars of microscopes, il- 
luminating apparatus, mechanical accessories, and ap- 
paratus, for recording observations, all in due order. 
The succeeding divisions are devoted to apparatus for 
collecting, preparing, mounting, and storing specimens; 
to apparatus for bacteriology, blood examinations, and 
medical analysis; and to lists of microscopic slides, mod- 
els, and specimens. Notable features are the explana- 
tions and exceptional detail as to measurements in regard 
to each entry in the catalogue. The very full list of ob- 
jectives includes those of Leitz, Reichert, and Zeiss, as 
_ well as Mr. Baker’s own series, and is very convenient 
for reference. We observe, however, some errors in the 
calculation of total magnifications with e yepieces of stated 
powers with a tube-length of 160 mm. The well ar- 
ranged list of stains, mainly from the laboratory of Dr. 
G. Grubler, of Leipzig, will be of service to all micro- 
scopists, the list of mounting sundries being equally com- 
plete. The pages devoted to mounted objects are con- 
siderably extended, especially as regards the slide-lend- 
