24 



TIlc Use of a Simple Microscope. 



Another form of clieap stand has been devised by Messrs. 

 Smith, Beck, and Beck, and styled by them the Popular Micro- 

 scope, which has special merits (Fig. 23). Extreme" steadiness 

 is obtained by supporting the lower end in a socket, and porta- 

 bility, by its folding up. Its price is moderate — that is, from 

 10/. to 15Z. or 20/., proportionate to the amount of apparatus 

 supplied with it, all of which is of excellent workmanship. 



Another cheap, and very convenient, binocular and polarizing 

 microscope, invented by Dr. Lawson, has been brought out by 



