SEEDS AND GERMINATION 



used under this lens. It may be 16 in. long, 4 in. high, and 4 or 5 



in. broad. 



Various kinds of dissecting microscopes are on the market, and 

 these are to be recommended when they can be afforded. 



#. DIS- 

 SECTING 

 NEEDLE 

 V 2 natural 

 size. 



D. DISSECTING STAND. 



C. DISSECTING GLASS. 



A. IMPROVISED 

 STAND FOR LENS. 



Instructions for the use of the compound microscope, with 

 which some schools may be equipped, cannot be given in a brief 

 space ; the technique requires careful training. Such microscopes 

 are not needed unless the pupil studies cells and tissues. 



