ON DISSECTION". xxi 



2. Two pairs of forceps ; one large and one small. Both 

 pairs should be straight, and should have roughened tips to 

 secure a firmer hold. 



8. Two pairs of scissors; one pair large and strong for 

 general dissection, the other pair small for finer work. The 

 latter pair should have the blades either bent at an angle — 

 elbow scissors — or else curved. In selecting scissors, care 

 should be taken to see that they cut quite to the points of the 

 blades. 



4. A pair of bone-forceps or very stout scissors, for cutting 

 bone and other hard substances. 



5. A pair of stout needles, firmly mounted in handles. 



6. A pair of the finest sewing-needles, mounted in wooden 

 handles. Only about a quarter of an inch of the needle should 

 project. They are used for teasing histological preparations. 



7. A seeker, i.e. a blunt needle mounted in a handle, and 

 bent at an obtuse angle half an inch from the end. 



8. A pocket-lens, containing two or three l,enses mounted 

 in a handle, and giving when combined a ma.gnifying power 

 of at least six diameters. 



9. A razor, and some means for keeping it sharp. 



10. A blowpipe of metal or glass, with the end bent at an 

 angle. 



11. A glass tube~arawn out to a point at one end, and 

 fitted with an india-rubber cap at the other : for use in wash- 

 ing dissections, and in injection. 



For the dissection of the larger animals, as the dog-fish or 

 rabbit, a deal board, about two feet long by a foot and a half 

 wide, may be used ; to this the animal should be fastened by 

 pins, or by steel awls with wooden handles. 



Smaller animals, and special parts of larger ones, should 

 be dissected under water, which supports the parts and greatly 

 facilitates the dissection. For this purpose an ordinary white 

 pie-dish with sloping sides is well adapted, the bottom being 

 fitted with a soft deal Foard weighted with lead, or a sheet of 

 cork cemented in with marine glue. A similar but smaller 

 dish may be used for dissecting under spirit. 



Animals, such as the cockroach, which are difficult to tix 



