546 
SUMMARY OP CURRENT RESEARCHES RELATING TO 
pieces of the organs were immersed in weak Flemming for 24 hours* 
(2) Wash in water for 24 hours. (3) Series of alcohols, xylol, paraffin 
imbedding. (4) The sections fixed to the slide were stained with the 
following fluid : — Ziehl’s fuchsin 2 parts ; neutral glycerin 1 part. The 
sections should not be thicker than 3-4 p, and must be left in the stain 
for 24 hours. Instead of fuchsin, magenta-red maybe used. (5) Wash 
quickly in water; remove excess of water with blotting-paper, then 
immerse the preparation in a series of ether baths to prevent dehydra- 
tion by the alcohol. The immersion should last 4-6 hours. (6) Mount 
the sections in balsam dissolved in ether. 
The author found that all fixatives, except those containing osmic 
acid, gave very imperfect staining results. 
(3) Cutting-, including: Imbedding- and Microtomes. 
Jung’s New Knife-holder.* — Messrs. Mayer sand Schoebel describe 
some improvements in Jung’s microtome knife-holder. These improve- 
ments consist in the addition of (1) a pair of screws d; (2) a triplet 
of screws bp, ba,bd (fig. 137). The first set can be drawn out some 
Fig. 187. 
5 mm., so that a blade narrower than the usual 34 mm. can be used. A 
second set can be raised so as to permit the insertion of a thinner knife- 
blade ; moreover, by unequal arrangement in height they can be made 
to influence the inclination of the knife, and the front ones allow an 
adjustment for attaining a more perfectly horizontal section. 
Zeitschr. f. wiss. Mikr., xvi. (1899) pp. 29-32 (2 figs.). 
