750 



APPENDIX. 



mechanical motions to the stage. It has a handsome brass 

 stand, large body, with coarse and fine adjustments, and 

 drawer tube to eye-piece, and separate 1-inch and ^-inch 

 objectives of very superior quality, of moderate angular 

 aperture, cut to the Microscopic Society's gauge. 



The stage is arranged to receive the polariscope, and the 

 whole instrument is so made that additional apparatus may 

 at any time be added to it, at pleasure. The performance 

 of the objectives is unusually good ; the instrument is well 



Fig. 3G2. —Ladd's Microscope. 



