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 few simple implements. 



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



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.) 



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. 



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 holding 

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

 aging the assay. 



11. 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. 



18. 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 



