416 TABLE I. FOR DETERMINATION OF MINERALS. 



The Roman numerals refer to the systems of crystalliza- 

 tion, (page 32.) 



I. Monometric. IV. Monoclinic. 



II. Dimetric. V. Triclinic. 



III. Trimetric. VI. Hexagonal or Rhombohedral. 

 The page on which each species is described is mentioned, 

 that the student may conveniently turn to the fuller descrip- 

 tions for a farther examination of a mineral. 



The kinds of rock in which the species occur is often adder, 

 after the description. 



I.— SOLUBLE MINERALS. 



A. No Effervescence with mumatic acid, even if heated. 



a. Not deflagrating on burning coals. 



Sal ammoniac, 100. I ; crusts ; G 1-5 — 1*6 ; wh, ywh ; taste acute and pungent ; not 



deliquescent; Sul, effervesce; mixed in powder with 



quicklime ammoniacal odor ; volatile. 

 Alum, 127. I ; wh ; very soluble, sweetish astringent: Bl, fus ! intumesces. 



Common salt, 104. I ; G 2-2 — 2-3 ; w, rdh, gyh ; saline ; crystals cubic : Bl, de- 

 crepitates. 

 Epsom salt, 124. Ill ; G 1-7— 1-8 ; w ; bitter saline : Bl, deliq. 

 Wliite vitriol, 271. Ill ; G 2 — 2-1 ; wh ; astringent-met : Bl, w coating on charcoal. 

 Borax, 107. IV ; G 1-7 — 1-8 ; wh ; slow efflor ; sweetish alkaline : Bl, swell* 



up and becomes w and opaque. 

 Glauber salt, 102. IV ; G 1-4 — 1-5 ; wh, gyh ; cooling and bitter : Bl, watery fusion. 

 Copperas, 246. IV ; G 2 ; gn, ywh, wh ; astringent-met : Bl, red ; Bor gn glass. 



Blue vitriol, 297. V; G 2-2 — 2*3 ; sky-blue ; nauseous met: Bl, copper reaction. 

 White arsenic, 226. Capillary cryst ; bot, mas ; Gr 3-7 ; w ; taste astringent, sweet* 



ish : Bl, volatile, alliaceous fumes. 



b. Deflagrate on burning coals. 

 Niter, 101. Ill ; G 1-9 — 2 ; w, not deliquescent or efflorescent 



Nit of soda, 103. VI ; G 2 — 3 ; wh ; deliq ; burns with a deep yellow light 

 Nitrate of lime, 123. Cryst efflorescences; G 1-62; w, gy; very deliquescent: Bl 



watery fusion, scarcely detonates. 



B. Effervescing with muriatic acid. 

 Natron, 103. IV ; G 1-4— i-5 ; w, gyh ; efflorescent 



II.— INSOLUBLE MINERALS. 



I. LUSTER UNMET ALLIC. 



A. Streak Uncolored. 



a. No fumes before the blowpipe on charcoal. 



1. Wholly soluble in one or more of the acids, (cold or hot), usually with effcrvercenos, 



* Infusible. 



Hardness. 



Hydromagnesite, 125. 1-0 — 2-0 Whitish crusts; G 2*8; adheres to the tongue* 



Serpentine. 

 Brucit* 125. 1-5— 2-0 VI; fol, lamina* flexible ; (J 23— 2-4 , w, gnh ; p'ly 



trl» no effervescence. Serpentine, 



