ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
441 
consists of an upright cast-iron post supported by three cast legs, and in 
it slides the elevating post, worked by a sprocket wheel. The upright 
post with its legs is 28 inches high ; the elevating post is of equal length, 
&nd is made of two-inch steel tubing. Upon the top of the elevating post 
is a head-post, which receives the bed-plate for carrying the camera and 
Microscope. The head-post is turned to exactly fit the tube, and permits 
the bed-plate to be revolved on its horizontal axis. The bed-plate is 
60 inches long and 5J inches wide, and consists of a piece of 3/16 in. 
Fig. iOS. 
rolled steel, to which are riveted two dressed half-inch steel tubes. 
These tubes are placed near each edge, and give rigidity as well as 
serving for guides for the camera and Microscope carriages. In the 
centre of the bed-plate is a rack for the adjustment of the camera and 
Microscope. The bed-plate is arranged to rotate upon its vertical axis. 
The stand is provided with castors so adjusted that it may be thrown 
off its legs with the foot. The apparatus can be used in the vertical or 
horizontal position, or at any inclination. 
C5) Microscopical Optics and Manipulation. 
Ward, R. Halsted, M.D. — Localising Microscope Objects. 
[Advocates the noting of their angular position in terms of a clock-face.] 
Micr. Bulletin (Philadelphia), April 1899, p. 12. 
