ZOOLOGY AND BOTANY, MICEOSOOPY, ETC. 115 



They are in principle identical with that of Schieck. The revolving 

 object-holder is, however, made of ivory, and is much larger, being 

 4^ in. in diameter and 1^ in. wide. There is also a double row of 

 apertures for the objects — one row for transparent, and the other for 



Fig. 11. 



opaque — so that, instead of 20, it holds 44 objects. There is also 

 at one point of the circumference an intermediate set of apertures, ap- 

 parently for inserting farther objects on disks, corks, &c. (In Winter's 

 there is a complete row of 19 of these apertures, 10 with corks). 



Winkel's Large Drawing Apparatus.* — This (fig. 12) is in- 

 tended for drawing objects under a low power, and also without 

 any magnification. On the side of the standard A, and above the 

 stage T and mirror S, is a cross-arm B carrying a lens L, and over it 

 a small right-angled prism P, which acts as a camera.f On the other 

 side there is a longer arm, also with a prism for drawing objects in 



* Dippel's 'Das Mikroskop,' 1882, pp. 632-3 (1 fig.)- 



t The text states P to be a prism (protected by a ring) though the fig. 

 hardly agrees. 



I 2 



