684 



INDEX 



Apparatus blowpipe, 546. 

 Apparent angle, 206. 

 Aquamarine, 437. 

 Aragonite, 392, 602, 660. 

 Ardennite, 665. 

 Arfvedsonite, 435, 659. 

 Argentite, 297, 596, 630. 

 Argyrodite, 630. 

 Arsenates, 236. 

 Arsenic, 293, 620. 



tests, 585. 



Arsenical pyrite, 318. 

 Arsenic oxides, 346. 

 Arsenides, 232, 294. 

 Arseniosiderite, 652. 

 Arsenolite, 346, 640. 

 Arsenopyrite, 318, 597, 622. 

 Arzrunite, 642. 

 Asbestos, 433, 500. 

 Asbolite, 369. 

 Astrophyllite, 659. 

 Assay, 578. 

 Asymmetric, 132. 

 Atacamite, 334, 644. 

 Atomic weights, 223. 

 Augelite, 656. 

 Augite, 123, 424, 676. 

 Aurichalcite, 641. 

 Autunite, 520, 655. 

 Awaruite, 632. 

 Axes, Crystallographic, 15. 



calculations, 83, 128. 



hexagonal, 85. 



monoclinic, 128. 



orthorhombic, 120. 



projection of, 35. 

 Axial angles, 16. 



optic, 205. 

 Axial planes, 16. 

 Axial ratios, 84- 

 Axinite, 469, 664. 

 Axis, didigonal, 14. 



digonal, 14. 



dihexagonal, 14- 



ditetragonal, 14. 



hexagonal, 14. 



of alternating symmetry, 15. 



optic, 198. 



polar, 55. 



trigonal, 14- 



tetragonal, 14. 



twinning, 138. 



zonal, 22. 

 Azurite, 399, 608, 641. 



Babingtonite, 660. 

 Baddeleyite, 682. 

 Bakerite, 664. 



Balance, Joly's, 261. 



Westphal, 264. 

 Barite, 11 6, 528, 601, 662. 

 Barium, tests, 565. 

 Barkevikite, 435. 

 Barrandite, 654. 

 Barysilite, 648. 

 Barytocalcite, 395, 660. 

 Basal cleavage, 256. 

 Basal pinacoid, 68. 

 Basic salts, 226. 

 Base, 68. 

 Bastnasite, 679. 

 Baumhauerite, 622. 

 Bauxite, 366, 602, 678. 

 Baveno twins, 406. 

 Bayldonite, 643. 

 Bechilite, 664. 

 Beegerite, 628. 

 Belonesite, 670. 

 Bementite, 666. 

 Benitoite, 103, 505, 668. 

 Beresonite, 647. 

 Berthierite, 320, 625. 

 Bertrandite, 680. 

 Beryl, 89, 436, 605, 682. 

 Beryllium, tests, 571. 

 Beryllonite, 657. 

 Berzelianite, 627. 

 Berzeliite, 652, 

 Beudantite, 646. 

 Bevelment, 22. 

 Beyrichite, 307, 630. 

 Biaxial, 171. 



Biaxial interference, 200. 

 Bieberite, 637. 

 Bindheimite, 647. 

 Binnite, 621. 



Biotite, 492, 601, 615, 660, 672. 

 Birefringency, 168. 



sign of, 194- 

 Bisectrices, 173. 



dispersion, 207. 

 Bismite, 346. 

 Bismuth, 293, 629. 



tests, 580. 



Bismuthinite, 296, 629. 

 Bismutite, 650. 

 Bismutosmaltite, 622. 

 Bismutosphaerite, 650. 

 Bixbyite, 633. 

 Black jack, 301. 

 Black sands, 288. 

 Blende, 301. 

 Bloedite, 539, 637. 

 Bloodstone, 360. 

 Blue earth, 283, 444. 

 Blue vitriol, 540. 

 Bobierrite, 657. 

 Bog iron ore, 363. 

 Boleite (percylite), 644. 



