LADD'S TRIPOD STAND. 115 



Nachet and Hartnack of Paris, and Merz of Munich, 

 hold an almost equal rank as makers of first-class 



FIG. 67. Ladd's Student's Microscope. 



microscopes, and in point of excellence of workman- 

 ship fairly rival those of English makers. 



FIG. 68. Nacliefs Portable Demonstrating Microscope. 



i 2 



