ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
583 
Sticker’s Travelling Microscope.* — Under this name Dr. George 
Sticker describes a new form of portable Microscope made [by the firm 
of Leitz to his design. 
The general arrangement will be easily understood from the two 
figures (figs. 96 and 97). When packed in its leather case it does not 
exceed 15 x 5J x 6 cm. The lid of the case serves as a stand, and a 
metal rod carries the object-table, mirror, diaphragm, &c. The coarse 
adjustment is attained by sliding the tube, and the fine by a screw be- 
tween the tube and the objective. The case contains places for an ocular 
Fig. 97. 
and two objectives. Only the optical upper part of each objective is 
packed, and one lower part. The traveller selects the system to suit 
his purpose. Finer objectives secured in their metal cases can be also 
packed. 
The weight of a waterproof pocket carrying the leather case, and a 
second case for immersion oil, stain solutions, slides, and cover-glasses, 
is only 920 grm. (2 lbs/), which weight also includes a leather strap 
for slinging the whole on one’s shoulder like a field-glass. 
Berger’s New Microscope. f — The novelty in this instrument is en- 
tirely confined to the overstage, and is intended to meet the constructional 
difficulties involved in adapting the adjustments (especially the fine) to 
Microscopes used for high-power photomicrography. Usually the strain 
on the fine adjustment caused by the extreme length (and consequent 
weight) of tube is a decided disadvantage. Herr Berger arranges so 
that both his coarse and fine adjustments are independent of the draw- 
out. The Microscope is also suitable for ordinary use. 
Fig. 98 gives a general view, fig. 99 a vertical section, and fig. 100 
a ground plan. 
The oval-shaped piece B is arranged as a handle, which affords a 
strong brace between the fine adjustment path Y (fig. 100) of the micro- 
meter work and the special hollow-cast standard H (fig. 99). The fine 
adjustment differs widely from the general form, and is fitted by means 
* Zeitschr. f. wiss. Mikr., xiv. pp. 433-6 (2 figs.), 
t Zeitschr. f. Instrumentcnk., pp. 1 29-33’ (3 figs.). 
