ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



167 



thus compressed, is first imbedded in carrot, pith, collodion, &c., or 

 better still, fixed with liquid glue on a piece of wood. 



Fig. 42, 



Fig. 43. 



Any kind of razor may be used, and the knife may be placed in 

 any position, and by the aid of thin metal blocks, any desired 



