MANUAL OF NATURAL HISTORY. 685 



4. A small pickaxe, for fossils. 



5. A stout jack-knife and a file, for ascertaining 

 the streak and hardness. 



6. A pocket lens, with two or three glasses. 



7. A bag for carrying specimens, of stout, flexible 

 leather, in shape resembling a game-bag. 



8. An accurately graduated compass. 



9. A klinometer, that of Prof. Henslow is one of 

 the most simple. 



10. A portable level. 



1 1 . A mountain-barometer, or a sympiesometer. 



12. A magnet 



13. A chemical test-chest. These are now kept, 

 ready-fitted, by some chemists and philosophical-in- 

 strument dealers in the principal cities ; but for those 

 who cannot procure such, or who are desirous of 

 making one up themselves, we shall enumerate the 

 various necessary apparatus and re-agents, which 

 can easily, by a little ingenuity, be adapted to any 

 portable chest. This we are the more inclined to 

 do, as we would recommend a somewhat larger and 

 more extended set than is usually prepared, so that 

 the traveller may be enabled to make rough analyses 

 of soils, or a general qualitative examination of 

 mineral springs. 



I. APPARATUS. 



1. Small scales and weights ; 2, an agate pestle and mortar ; 3, a 

 platinum crucible with ground cover ; 4, a platinum spoon ; 5, pla- 

 tinum wire and holder ; 6, fine-pointed forceps tipped with platinum; 

 7, small porcelain capsules ; 8, test-tubes (of German glass) ; 9, a 

 pipette; 10, some glass rods: 11, a small graduated measure; 12, 



