THE MICROSCOPE. 



kinds and sizes are required for microscopic dissection : the 

 best for the purpose are represented in figs. 59 and 60, being, 



Fig. 59. 



in fact, the very delicately made knives used by surgeons 

 in operations upon the eye. Dissecting needles may be 

 either straight or curved. They may be fixed, or made to 

 take in and out of their handles. The most convenient 



Fig. 60. 



Fig. 61. 



are shown in fig. 61 ; those made of Palladium by Mr. 

 Weedon, Hart Street, are very much the best. 



In the preparation of objects, no microscopist was ever 

 more successful than Swammerdam : " His chief delight 

 seems to have been in constructing very fine scissors, and 

 giving them an extreme sharpness ; these he made use of 



