ZOOLOGY AND BOTANY, MICROSCOPY, ETC, 
431 
MICROSCOPY. 
A. Instruments, Accessories, &c.* 
Cl) Stands. 
Preparation and Horizontal Binocular Microscope.^ — Drs. L. 
Driiner and H. Braus describe an improved form of their binocular 
Microscope which has been especially useful for the dissection of nerves 
and muscles. The present improved stand (fig. 32), also made by Zeiss, 
enables the optical portion of the instrument to be placed in any desired 
position, this being for the purpose of facilitating the dissection of large 
surfaces, and, when the Microscope is placed horizontally, for observing 
the movements of small organisms through the vertical sides of aquaria. 
The optical portion may be moved with respect to the fork h by the 
rack and pinion r. The forks h and Ji are connected by a ball-joint I 
supplied with the necessary clamps ; the whole of this rotates with the 
collar li' about the horizontal rod /. This rod has a longitudinal motion 
* This subdivision contains (1) Stands ; (2) Eye-pieces and Objectives ; (3) Illu- 
minating and other Apparatus ; (4) Photomicrography ; (5) Microscopical Opt.ic6 
and Manipulation ; (6) Miscellaneous. 
f Zeitschr. f. wiss. Mikr., xiv. (1897) pp. 5-10 (2 figs.), 
p. 580. 
1897 
Cf. this Journal, 1895, 
9 
H 
