44 



Fig. 1!>. 

 BERBER'S Micrometer Movement. 



(Full Size.) 



A full description of this new form of micrometer movement, and of the alterations 

 in the upper portion of microscope stands entailed by its adoption, having been contri- 

 buted to the "Zeitschrift fur Instrumentenkunde" (vol. XVIII, 1898, pp. 129 133) by 

 the designer, Mr. MAX BERGER, Chief of our Construction Office, we must refer our 

 readers to this article for detailed particulars of the construction. 



The principal advantages of the new form of body over the o 1 d are as follows : 



1. The projection of the tube, i. e., the distance of the axis of the tube from 

 the column supporting the body, is sufficient to admit of objects having a diameter up to 

 150 mm (about 6 in.) being placed upon the stage and thoroughly examined, and this 

 projection may be still further extended. We have, indeed, already made full use of this 

 possibility in the construction of our so-called Brain-section Microscope, Stand l d (Fig. 25, 

 p. 57), the stage of which facilitates a thorough examination of objects up to 250 mm 

 (about 10 in.) in diameter. 



