ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
125 
are firmly clamped by binged flaps on tbe sides or in the middle of the 
case, which are held down by two small clips. 
New Clip for holding Cover-Glasses.* — Dr. Seiffert has devised a 
new clip for holding cover-glasses. As seen in fig. 23, the cover-glass 
is held on the sharp edges by the spring 
points of the clip, and is released by 
pressing on the handle. The curvature 
of the points is to allow the cover-glass 
to be immersed in the colouring solution 
in a dish, and to remain there while still 
held in tbe clip. 
Microscopic Filter, f — Dr. P. W. 
Shimer has devised the apparatus shown 
in figs. 24 and 25 for concentrating upon a slide or cover-glass the 
suspended matter in measured amounts of water or urine. Fig. 24 
shows the arrangement for a cover-glass, fig. 25 that for a slide. The 
filter-tube is a graduated tube, 5 in. long and 5/8 in. internal diameter, 
open and ground at both ends. The filter B, which has a perforation 
the size of the bore of the tube, and consists of thin blotting-paper 
Fig. 23. 
Fig. 24. 
Fig. 25. 
or mauilla paper (when bacteria are to be collected), is saturated with 
water and made to adhere to the base of the tube, which is then pressed 
down over the cover-glass C (fig. 21) or slide I (fig. 25), by means of the 
spring G and chain H. In fig. 24, D is a pile of blotting-paper, which is 
* Zoitbchr. f. Aug. Mikr., i. (1895) p. 84. f Micr. Bull., xi. (1S94) pp. 22-3. 
