108 



THE MICROSCOPE. 



Tig. 62 represents a small portable instrument by Murray 

 and Heath, designated " The Sea-side Pocket Microscope," 

 the chief recommendation of which is its simplicity of 

 construction and its small compact form ; the whole packs 

 into a case six inches long, and may be carried without 

 incumbrance in the pocket of the field-naturalist. 



The body of the instrument is seen at c, supported on 

 a tripod, which is removed and folded up at b. If desired, 

 it can be used in the upright position, as at a, when a 

 pair of short legs placed near the mirror must be turned 

 down, and forms a tolerably steady support to the body. 

 The adjustment is made by sliding the body through the 

 outer tube, which carries a triple combination of achromatic 

 objectives. A live-box, &c. is added ; and, when packed 

 in a morocco case, is sold for 21. 5s. 



Fig. 63. — Baker's Traveller's Microscope. 



An instrument somewhat similar in appearance to the 

 foregoing, but differing so materially in detail as almost to 



