ZOOLOGY AND BOTANY, M1CRJSOPY, ETC. 



381 



animals arc injected by means of an airblast apparatus or aspirator to 

 which a manometer is attached for indicating the pressure. 



The vascular system is first washed out with normal saline and then 

 injected with the fixative heated to -40° C. The solutions used were 

 sublimate, formalin, and Hermann's fluid. The results appear to have 

 been excellent. | 



Vasoin, B. — TJeber die Verauderungen des Ruckenmarkes bei der Fixierung. 



[Calls attention to the different histological appearances in, the peripheral and 

 central portions of spinal cord after fixation.] 



Zeitschr. wiss. Milcroslc, xxi. (1904) pp. 420-31 (1 pi.) 



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



Paraffin Imbedding Bath.* — The paraffin bath, invented by F. 

 Fuhrmann, is designated a universal paraffin imbedding thermostat, as it 

 is adapted for in vacuo as well as the ordinary impregnation. The con- 



Fig. 69. 



stractionis shown in the accompanying illustrations (figs. 60, 70). R is 

 the ordinary and E the vacuum bath. 0, O are openings for thermo- 

 meter and thermo-regulator. Z is the water-level, and H the outflow-tap. 

 D is the lid of the vacuum bath, and the two holes therein are for a 

 thermometer and the exhaust tube which is provided with two stop- 

 cocks and a manometer. The case is made of copper and is covered 



* Zeitschr. wiss. Mikrosk., xxi. (1904) pp. 4G2-7 (2 figs.). 



