B. The Stage. 



The dimensions of the stages of all our microscope stands, are sufficiently 

 large to allow of any size of object slide or carrier being used. 



The opening of the stage has in most of the stands a diameter of 33 mn 

 (l*/i6 in.) in order that the large field possessed by the objectives of long focu 

 may be fully utilised. It may, however, be reduced by the insertion of a dia 

 phragm (the stage diaphragm) which is supplied with each instrument. 



In Stand VI* the diameter of the stage opening is only about 20 mn 

 (about 3 /4 in.). 



Revolving Stages are fitted to Stands I and III M ; such stages may be sub 

 sequently fitted to the other varieties of Stand III as well as to Stands IV and V 



Mechanical Stages, i. e., mechanical means of moving the object within th< 

 plane of the stage in two directions at right angles to each other, may be fittec 

 to Stands I, III, IV and V. 



No. 44. The * Large Mechanical Stage, Fig. 14. The range of th< 

 movements of this pattern of stage is 50 mm (2 in.) in one direction anc 

 35 mm (1% in.) in the other; the readings of variations in either direction arc 

 taken from scales and verniers. (See Zeitschr. f. wiss. Mikrosk., vol. XI, 1894 

 pp. 301 304.) In the latest models a third scale and vernier is added foi 

 recording the positions of the movable cheek-piece which secures the object slide 

 This arrangement facilitates the convenient use of the apparatus as a "finder", 

 and the process of centring is at the same time much simplified by the additior 

 of a centring-glass an object slide having a cross ruled upon it. (Foi 

 particulars see the directions for using this apparatus.) 



No. 45. Revolving Vulcanite Stage. This stage can be used inter- 

 changeably with the Large Mechanical Stage No. 44. To effect this the clamping 

 screw b is removed and the two centring screws unscrewed so far, that the stage 



Large Mechanical Stage for Stands I, III and VI .... 

 Revolving Vulcanite Stage interchangeable with the Large 



Mechanical Stage in Stands I, III and IV 



Codeword 



100. Paranza 



25. I'arar 



