106 THE MICROSCOPE. 



accessory apparatus are all of standard size, and can, 

 therefore, be applied to any of the larger and more 

 elaborate instruments of English model. The fine- 

 adjustment is ingeniously modified, very delicate, and 

 quite free from lateral motion. Not only is the field of 

 all the objectives supplied with it excellent, but their 



FIG. 59 Collins's Histological or Student's Microscope. 



penetration is of a high standard. The stand alone 

 can be had at a lower price with eye-piece and case. 

 On the whole, the instrument is of excellent workman- 

 ship, and possesses all the advantages and conveniences 

 which belong to students' microscopes. 



Collins's Binocular Microscope Stand (fig. 60), on the 

 "Jackson" principle, is extremely steady and solid. 



