ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 575 
knife are precisely similar to those for the movement of the object in 
the instrument for series just described. In the present instrument the 
turning axis is vertical. With the heavy cast-iron base-plate b is rigidly 
connected the fluted upright support V, between the cover of which and 
the base-plate moves the axis A and with it the plate C and the parallelo- 
gram h. The end-piece Y of the latter serves for the fastening of the 
knife. The plate C carries on its end the double nut S and S', in which 
moves the micrometer screw connected with the toothed wheel m. The 
arrangement for regulating the thickness of the sections is similar to 
that in the preceding instrument. 
Fig. 91. 
For cutting under liquids a crescent-shaped vessel (fig. 91) is brought 
round the stand. In this case the form of the end-piece Y of the 
parallelogram is modified as seen in the figure. 
(4) Staining- and Injecting-.* 
Injection Masses for Lymphatics.* — Dr. Gerota used the following 
coloured fluids for injecting lymphatic vessels. The one most recom- 
mended is made with Prussian blue. To 2 grm. of this pigment are 
added 3 grm. of pure turpentine oil, and the mass carefully rubbed up 
in a porcelain mortar. After this 15 grm. of sulphuric ether are added 
and the mixture strained through a double layer of linen. The mass is 
* Anat. Anzeig., xii. (1896) pp. 216-24 (4figs.). 
