SSI 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Becker's Sliding- Microtome.* — Dr. J. W. Spcngel describes an 

 improved form of sliding microtome (fig. 181) devised by him in 

 conjunction with Herr A. Becker, who is also responsible for the 

 workmanship. 



In general aspect and in principle it resembles its predecessors of 

 the same type, the Rivet, Thoma-Jung, &c, while the novelty of its 

 details gives it its characteristic features. For instance, the slide- 

 ways are made of plate glass, which allows a perfectly free and even 

 to and fro motion of the slide or carrier without the aid of any 

 lubricant. The stand b is made of cast iron. The side-plates a 

 arc set on the middle plate a' at an angle of about 45° ; greater 



Fig. 181. 



certainty being obtained at this angle than when the slide works at a 

 less inclination, as in the Jung microtome. The firmness of the 

 carrier's movement is increased by strong springs which work against 

 the under surface of the longitudinal bar c fitted to the central 

 plate. The knife-carrier is provided with an arrangement for altering 

 the position of the knife. Its upper part, a plate d, does not rest 



Zeitschr. f. Wiss. Mikr., ii. (1885) pp. 453-9 (2 figs.). 



