ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



405 



inent, with milled heads situated either side of the limb. The body is 

 Ik in. diam., a most useful size when photomicrographs are being made 



Fig. 52. 



with a low-power objective without employing an eye-piece. The draw- 

 tube is arranged to carry eye-pi eces of the ll.M.S. No. 1 size (23* 2 mm.). 

 A built-on mechanical stage, with movements of 30 mm. in a vertical 



„ / /'.'/. 



18th, 1915 



•1 v 



