75 



The optical arrangement is the same as that of Stand X a . The stand is 

 provided with an extra sliding piece fitted with the "Society" screw which, when 

 in position, closes the opening of one tube. The other tube may then be employed as 

 a monocular microscope, the objective in use having first been exchanged for one of 

 higher power if necessary (see ,,Zeitschr. f. wiss. Mikrosk.", vol. XIV, 1897, pp. 5 10). 



Fig. 36. Stand Xb (BuAis-Diu'>Eifs Dissecting Stand) with stereoscopic camera and 

 time and instantaneous shutter. (V 4 Full Size.) 



The stand is mounted on a heavy oblong foot and is fitted with 3 rack- 

 aml-pinion and 4 rotary movements. By the appropriate use of these move- 

 ments every point of an object, however irregular its outline may be, can be 

 thoroughly examined. 



This stand is not provided with a stage. In cases where the microscope is 

 also required for investigations by transmitted light we recommend the use of stage, 

 No. 9(>a, which is very similar to the lower part of Stand P I. 



Price : Code- words : 



No. 96: Stand X b Marks 260. Pastoso. 



96 a : Stage for Stand X b 60. Pastrana. 



The illuminating appliance, No. 43 (see pp. 37 and 76) may, if desired, be fitted to 

 Stands X a and X b at an additional cost of Marks 36. . 



At the suggestion of Dr. DRTNER we have lately commenced to construct 

 Stand X b in such a form that a stereoscopic camera may be immediately sub- 



