408 MINERALOGICAL INSTRUMENTS. 



arsenic in Khoordistan, China. Copper mines are also re- 

 ported from New Zealand. 



MINERALOGICAL IMPLEMENTS. 



For the examination and collection of minerals, the min 

 eralogist should be provided with a |ew simple implements. 9 



I. A three-cornered or small flat file, for testing hardness. 

 v 2. A knife with a pointed blade, of good steel, for trying 



hardness. Berzelius suggests that it may be magnetized, to 

 be used as a magnet. 



3. The series of crystallized minerals, constituting the 

 scale of hardness (see page 64.) The diamond and talc 

 are least essential. 



4. Small glass -stoppered bottles (one-ounce) of each of the 

 acids muriatic, sulphuric, and nitric, in a dilute state, (page 

 66.) 



V< 5. A blowpipe, (page 67.) 



\ ( 6. The common fluxes, (page 69.) 



\ ( 7. Pieces of charcoal for blowpipe purposes, (page 69.) 



Also strips of mica for holding the assay when platinum is 



not at hand. 

 Jnt x 8. A candle or lamp for blowpipe trials, (page 68.) 



9. Platinum foil, wire, and forceps, (page 69.) 

 ' ; 10. Also a pair of small steel spring forceps, for holjiing 



fragments of minerals in the blowpipe flame, and for man- 



aging the assay. 



II. A piece of glass tube, | inch bore ; and two or three 

 test tubes (of hard glass,) or small mattresses, for trying the 

 action of acids, and testing the presence of water by the 

 blowpipe. 



12. A pair of cutting pliers, for removing chips of a min- 

 eral for blowpipe or chemical assay. 



13. A common goniometer ; or a pair of arms pivoted to- 

 gether to use with a scale, as explained on pages 47, 48. 

 The reflecting goniometer (page 50) is also a desirable in- 

 strument. 



14. Models of the common crystalline forms ; they may 

 be made by the student, out of chalk, or wood ; and when 

 finished, a coat of varnish or gum will give great hardness 



o the chalk. 



15. A pair of balances for specific gravity, (page 63.) 



16. A hammer weighing about two pounds, resembling a 



