250 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Washing Apparatus for Fixed Material.* — R. Kowler describes an 

 apparatus (rigs. 37, 38) by means of which tissues can with safety be 

 washed in a stream of water. The apparatus is made of glass, of the form 

 shown in the diagram. The rubber tube is connected with a water supply. 

 The expanded chamber is at each end separated from the narrow part 

 of the glass tube by a sieve of glass (Glassieb). The material is intro- 

 duced into the chamber, which is then closed, and the water is turned 

 on slow]y : at first, until the air is driven out. Then the current of water 



Fig. 37. 



is so adjusted that the material remains on or near the bottom of the 

 chamber. 



Methylated Spirits for Histological Purposes.! — In the German 

 Empire spirits of wine for commercial purposes consists of 90 p.c. ethyl- 

 alcohol to which have been added small quantities of methyl-alcohol, 

 acetone and pyridine bases. C. Kittsteiner finds that, as a fixing re- 

 agent, this fluid is for ordinary purposes almost as good as ethyl-alcohol. 

 Material must, however, only remain in it for three days, and must then 



* Zeitschr. wiss. Mikrosk., xsvi. (1910) pp. 259-60. 

 t Tom. cit., pp. 191-203. 



