1881.1 



MICROSCOPICAL JOUENAL. 



225 



an instrument as is represented in 

 Fig. 49. It is made by tlie Bausch 

 & Lomb Optical Company, and 

 is known as the " Handy Dissecting 

 Microscope." The base is a thick 

 plate of glass, into which the steel 



many purposes. For dissection a 

 more elaborate microscope is made 

 by the same Company at a reasonable 

 cost, but we still think that good dis- 

 section-microscopes are entirely too 

 costly. The " Complete Dissecting 



Fig. 50. 



Stem supporting the lens is screwed. 

 By placing a sheet of white paper be- 

 neath the glass, a good illumination 

 from below can be obtained, and by 

 the use of a bull's-eye condenser, 

 opaque objects can be easily selected 



and Mounting Microscope," to which 

 we allude, is represented in Fig. 



50- 



Another novelty, recently intro- 

 duced by Messrs. Bausch & Lomb, is 

 an instrument for cutting circles of 



Fig. 51. 



for mounting. We commend this in- 

 strument thus unreservedly, without 

 having used it, because it is practi- 

 cally just the same as an arrangement 

 which we contrived long ago, and 

 which we found to be very useful for 



thin glass, shown in Fig. 51. It is at- 

 tached to the turn-table, by means of 

 the screw shown at the right of the 

 figure, so that the cutting point stands 

 over the turning plate. • The thin 

 glass is placed upon the turn-table 



