are connected with the clamping ring by hinges. The size of the mirror is 

 50 X 75 mm (2X3 in.). The clamping ring is attached to the draw-tube before 

 putting on the ocular and is secured by means of three screws. The upper 

 parts - - prism casing and mirror - - can be turned back on their hinges so as 

 to enable the object being viewed direct instead of through the prism. The 

 ABBE cube and other parts always return to exactly the same position on 

 being restored to their original place. (See Fig. 47.) 



Price : Code-word : 

 JVo. 110: Small ABBE Draimng Camera, incl. case . . Marks jo. . Patronato. 



Fig. 47. 

 Small ABBE Drawing Camera, No. 110. 



( 3 / 5 Full Size.) 



2. * Large ABBE Drawing Camera, No. ill. 



After removing the eye-piece the clamping ring of the drawing apparatus 

 is slipped over the tube and fastened by tightening the screw S. By altering 

 the position of the clamping ring the aperture in the silvered prism may be 

 brought to the same height with the pupil of the emerging rays of the micros- 

 cope. The screws L and H (Fig. 48 a and 48 b ) serve to facilitate the accurate 

 centring of the prism. (See "Zeitschr.f. wiss. Mikrosk.", vol. XI, 1894, pp. 289298.) 



The length of the supporting arm and the size of the mirror are the same 

 as with the preceding apparatus. 



The casing, together with the prism and the moderating glasses, may be 

 turned aside about the pin Zinto the position indicated by the dotted lines in Fig. 48 a . 



Price : Code-word : 

 No. Ill: Large ABBE Drawing Camera, incl. case . . Marks 60. . Patudo. 



