= 6 7 = 



The arm carrying the tube can be moved up and down in two different 

 ways; first, in the ordinary manner by rack and pinion, second, by moving a 

 slide (carrying the tube along with it) in a dovetail-formed groove. To clamp the 

 slide a short lever is provided. 



The body-tube is provided with an image-erecting PORRO prism-system. 

 I he lower end of the tube carries the standard thread ; an intermediate ring, 

 15 mm ( s /i6 in.) in length, accompanies each stand, in order to be able to use the 

 higher power objectives even without nose-piece. The employment of the nose- 

 piece is, however, to be recommended, since it permits the rapid change from 

 teasing out and dissection of specimens with low magnifications to observation 

 with higher magnifications. The intermediate ring should be removed 

 before attaching the nose-piece. 



Respecting details of construction, see: P. CULMANN, Monokulares bildauf- 

 richtendes Prismenmikroskop, Zeitschr. f. wiss. Mikrosk. XX, 1903, pp. 416420. 



The lower and medium power objectives to D can be used on Stand XI ; 

 the systems ao and ai, are supplied in a special mount when used with this stand. 

 A still lower power, 55 mm (2 l / 8 in.) focal length, costing 15 Marks (Codeword.- 

 Pataroxa), is likewise suitable. 



Our Drawing Apparatus No. 109112 can be attached to this just as to our 

 other monocular stands. 



Stand Pll. 

 Drawing Apparatus for low magnifications. 



This stand is intended not only for the observation and dissection of large 

 objects but also to afford facilities for drawing an extensive specimen upon any 

 desired scale within wide limits. 



Two horizontal arms may be moved by rack and pinion up or down the 

 massive brass column situated on the left. The upper one has a hole bored into 

 its outer extremity for the insertion of various holders for spectacle-lenses, magni- 

 fiers and for an erecting microscope ; the lower arm carries a stage frame into 

 which a plate of glass, metal or wood may be inserted. Fig. 32, p. 68. 



Marks Codeword 



Stand Pll (Drawing apparatus for low magnifications) in 



alder-wood cabinet. Without optical equipment 260.--- I'atescn 



Stand P II with drum containing PORRO prism-system, objective a*, 

 HUYGENIAN oculars 2 and 4, magnifiers Nos. 9 and 10, 4 spec- 



tacle-lenses, drawing prism No. 109 



410. - Paticojo 



