OF OPTICAL INSTRUMENTS. 



109 



FIG. 1156. 



1160. Small Popular Microscope, as above, with foreign objective of nearly similar 

 powers, with rack -work, spring clip to stage, concave mirror, animalculse 

 cage, and one eye-piece, with forceps and 9 objects in drawer, in mahogany case 

 complete . . . . . . . 250 



1162. Garden or Seed Microscope, a simple and compound instrument expressly 

 arranged by L. CASELLA, for the various requirements of gardeners, and also 

 as an excellent companion to the aquarium and the sea side (fig. 1162), p. Ill, in 

 mahogany case 4 inch. X 3 inch., and 1| inch, deep ; with plain practical 

 instructions . . . . . . . 15 



<>. 



MICROMETERS. 



1163. 100-THBEAD SCREW MICEOMETEE, of best construction, with dram divided 

 to 100 550 



1164. Jackson's Eye-piece Micrometer, with adjusting screw 



1165. EYE-PIECE for the above .... 



1166. MICEOMETEE CIECLE to fit eye-piece 



1167. on 3 X 1 inch, glass slide 



130 

 150 

 076 

 060 



