708 



APPENDIX. 



catch, andAvhen once centred it may be detached and reattached 

 with the greatest facility, without requiring a readjustment. 



Fig. 429 represents a smaller and less expensive form of stu- 

 dent's microscope, made by the Messrs. Grunow, and possessing 

 the same objectives as that represented in Fig. 428, but with a non- 



FlQ. 429. 



movable stage. Alessrs. Grunow also manufacture a first class 

 microscope, with brass mountings and all the accessories. (Fig. 

 430.) Their instruments have given great satisfaction wherever 

 they have been used. 



THE INVERTED MICROSCOPE OF DR. J. LAWRENCE SMITH. 



This instrument was invented and brought to the notice of 

 the Socicte de Biohgie of Paris, in 1850, by Dr. Smith, for whom 



