432 
SUMMARY OF CURRENT RESEARCHES. 
MICROSCOPY. 
[The Publication Committee of the Journal has decided on resuming the issue 
of the Microscopic Bibliography, which was dropped on the lamented death of 
Mr. John Mayall, jnn. It is intended in future to give at least the title of 
every work or paper (commencing from January 1st, 1899) coming under the 
head of Microscopy A or of Technique 3 (Microtomes) ; and we shall be much 
obliged to any of our Fellows who will call our attention to any such papers or 
articles published in Journals which are likely to escape our notice. — Editor.] 
A. Instruments, Accessories, &c.* 
(1)] Stands. 
Reichert’s New Polarising Microscope. — The stand (numbered lin 
catalogue) is large model (fig. 97), and is fitted with a square vulcanite 
plated stage, 100 X 100 mm. The body rotates about the optical axis, 
the coarse adjustment is by rack-and-pinion, and the fine with new 
delicate micrometer screw. Abbe’s illuminating apparatus and iris 
diaphragm are supplied ; the mirrors are plane and concave ; and the 
instrument is adjustable in all positions. The polarising apparatus is 
after Ebner and Drasch, and is easily affixed to the stage, the divided 
circle being just as easily applied to the rim of the upper joint. The 
polarising apparatus is also easily removed, so that the instrument is 
available for ordinary histological and bacteriological work as well as 
for the finest investigations in polarised light, or for testing objectives 
with regard to their optical properties in polarised light. 
Reichert’s “Austria” Microscope. — This stand (No. iii. in cata- 
logue) is a well-made form of cheap Microscope (fig. 98). It has the so- 
called “ English ” black lacquered tripod foot, is compact in every part, 
and, though small, is a thoroughly practical instrument, and is strongly 
recommended to medical students. The coarse -adjustment is by rack- 
and-pinion, the fine by a new form of micrcmeter screw. The stage is 
3J x 3§ in., ebonite plated, with substage raised and lowered by screw 
at side. The instrument is fitted with an Abbe chromatic substage 
condenser with iris diaphragm and plane and concave mirrors. 
Reichert’s New Pocket Microscope. — This instrument (catalogue 
number 24a) is intended for meat inspection (fig. 99). It has a push- 
tube movement and micrometer screw. It is supplied in a suitable 
pocket case. 
Reichert’s Polarising Hand Microscope. — This is numbered 31c 
in the catalogue, and is intended for use in demonstration classes. The 
polarising apparatus is so arranged that it can easily be removed, and 
observations may then be taken without it. The adjustments are by 
push-movements of the tubes (fig. 100). 
* This subdivision contains (1) Stands; (2) Eye-pieces and Objectives; (3) Illu- 
minating and other Apparatus; (4) Photomicrography; (5) Microscopical Optics 
and Manipulation ; (6) Miscellaneous. 
