ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
441 
(6) Miscellaneous. 
Muencke’s Centrifugal Machine for Bacteriological and Clinical 
Examination Purposes.* — Dr. R. Muencke has devised a centrifugal 
machine (fig. 56) for bacteriological and clinical purposes. The machine, 
which, as the accompanying illustration shows, is worked by hand, is 
intended to avoid the waste of time incident to sedimentation of fluids 
Fig. 56. 
x. 
containing elements of very small specific gravity. By the aid of this 
apparatus oxalic acid crystals, red discs, albumen, and even micro- 
organisms, can be demonstrated under the Microscope in a moment, and 
for the examination of the urine and of any exudation it is of especial 
service. 
The machine, depicted 1/5 the natural size, merely consists of a plate 
which is caused to revolve by means of a rackwork and wheel. One 
turn of the wheel causes the plate to revolve 50 times. Fig. II. shows 
the wheel rotating, and fig. III. a glass tube which is used to contain the 
fluids. 
* Centralbl. f. Bakteriol. u. Parasitenk., xi. (1892) pp. 85-7 (3 figs.). 
