ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



201. 



When iu use the square stage is clamped firmly by a lever. The coarse 

 adjustment is by rack-and-pinion, aud the fine by a micrometer-screw. 

 The Abbe illuminating apparatus and iris diaphragm are the same as in 



Fig. 2 J 



stand No. II. The stand is jointed for inclination of tube. The whole 

 packs away in a mahogany case measuring 27*5 by 18*5 by 8 cm., as 

 shown in fig. 20. 



The instrument is also suitable for the highest laboratory work. 



