ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



661 



hour's immersion the capsule was removed with forceps or needles. 

 From this fluid the eggs were removed to chloroform, and thence 

 through chloroform-paraffin to paraffin m.p. 40°. This process is rather 

 slow, but it avoids the overheating, which is so detrimental to the yolk. 

 Formalin was found to fix the embryo badly. Tellyesniczky's fluid gave 

 good results. After a fixation of 24 hours the material was washed, 

 then stained with borax-carmin, and afterwards imbedded by the 

 chloroform method in paraffin m.p. 40°. The sections were fixed to the 

 slide with clove-oil-collodion. 



(3) Cutting, including 1 Imbedding- and^Microtomes. 



Leitz' New Microtome.* — This instrument is described by Professor 

 Henneberg who, after several months' use, has found it very satisfactory 



Pig. 154. 



and adapted to its purpose. The instrument is a firmly-built sliding 

 microtome, with automatic object-movement and large, heavy knife- 

 slide, which can be worked direct by the hand or by chain and tooth- 

 wheel. It is made in two sizes, with track-lengths of 32 and 42 k cm. 



* Zeitschr. wiss. Mikrosk., xxii. (1905) rp. 125-30 (4 figs.). 



