MANUAL OF NATUEAL HISTORY. 



673 



4. An instrument, which will be better under- 

 stood by the ac- 

 companying outline 

 than by description. 

 The upper edge a, is 

 sharp, and fitted for 

 cutting specimens 

 from the trunks or 

 large branches of 

 trees ; the curved 

 edge b, is for cut- 

 ting branches out 

 of ordinary grasp ; 

 and c, is a blunt 



curve for hooking them down for the sake of any 

 particular part. It may be fitted to a long handle 

 by a ferule, and secured by a thumb-screw d. 



5. A portable Bill-hook, with a hatchet edge 

 along the back ; this may be carried in a curved 

 scabbard, which can 

 be attached by a but- 

 ton or similar con- 

 trivance to a belt, or 

 otherwise slung at 



the side. The handle should be made of two pieces 

 of rough leather secured to a central plate by rivets. 



6. Two or three good strong jack-knives, and a 

 smaller sharp-pointed knife. 



7. A pocket-lens ; one with two glasses is prefer- 

 able, and it is safer to carry it in a breast pocket, 

 attached by a piece of ribbon or small cord to a 



