62 



Stand X a . 



The upper body with the double tube is removable. Fig. 28, p. 61. The 



stage forms a square with sides of 100 mm (4 in.) and has an opening of 33 mm 

 (i 5 /ie m -) diameter. Hand-rests may be attached at both sides of the stage and 

 are always supplied with each stand. After removing the upper body a vulcan- 

 ite fork, which accompanies Stand X a , may be screwed on to the body-tube 

 carrier in place of the stage. In this form (Fig 28 b ) the instrument is available 

 for objects of any shape and may, for instance, be conveniently used as a 

 "Dermatoscope" for examining the skin etc., the body carrier being steadied 

 by the hand. 



Instead of the tube-carrier illustrated in Fig. 28 a a straight column No. 9520 

 can be attached upright upon the stage, so that a stereoscopic camera may be 

 adapted to Stand X a ; the double tube also of Stand X b can be employed by means 

 of a column upon the lower part of Stand X a . 



Stand X b . 



This stand, Fig. 29, is primarily designed for the preparation of objects 

 which are too large to be dealt with on the stage of Stand X a . It is also ex- 

 cellently adapted for pond -life studies (whence it may aptly be termed an 

 Aquarium or Tank Microscope) and for the observation of portions of large 

 botanical objects, mineralogical specimens, etc., in short, for the microscopical 

 examination of small areas included within more extensive objects which are not 

 to be broken up into smaller fragments. 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). 



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

 and-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. 



