6 ALABASTRITES. 



usually slightly streaked Avith red, is by the ' 

 potters in Staffordshire, who form their 

 anoulds of plaster of Paris from it. It is 

 therefore called ' Potter's stone,' and sells at 

 about 9s. per ton of 2,400 lbs. (the long ton). 

 In working the Potter's stone, the fine blocks 

 are selected, and sold to the turners of ala- 

 baster ornaments." — {PLobert Hunt.) It is 

 also found in large quantities at Penarth, 

 Cardiff, Leek with, and Lavenock, in Gla- 

 morganshire ; at Newark, in Nottingham- 

 shire ; at Fauld Hill, in Staffordshire ; at 

 Old Chine, in Somerset; between Penrith 

 and Carlisle, in Cumberland ; and in Mona- 

 ghan CO., Ireland. Alabaster is soluble in 

 400 to 500 parts of water. When heated it 

 parts with its water of composition, and be- 

 comes Plaster of Paris, for which see Gyp- 

 sum. This stone is the Alabastrum of the 

 ancients, bj' whom it was carved into 

 statues and other objects. The name is 

 derived from Alabastron, a village of Egypt. 

 (See Oriental Alabaster). 



Biit. Mus., Case 57, 



31. P. G. Sides of vestibule, Derbyshire. 

 Large tazza and pedestal, on the eastern side 

 of the hall, from Fauld Hill, Staftbrdsliire. 

 Column against east wall. Column sup- 

 porting serpentine vase, west side of the 

 liall. Horse -shoe Case, Nos. 303 and 304. 



Alabastra agatato. a yellow variety 

 of Alabaster found at Sienna. 



ALABASTRITES, PUny . See Oriental 

 Alabaster. "This On^^x stone, or Ony- 

 chites aforesaid, some name Alabastrites ; 

 whereof they use for to make hollow boxes 

 and pots to receive sweet p ^rfumes and oint- 

 ments, because it is thought that they will 

 keepe and preserve them excellently well, 

 without corruption. The same being burnt 

 and calcined, is very good for diverse pias- 

 tres," — Pliny, book xxxvi. ch. 8. 



Alalite. a variety of Diopside from Ala, 

 in Piedmont. 



31. P. G. Horse-shoe Case, Nos. 1032, 

 1033. 



Alaunstein, Wernei'. See Alumstone. 



Albert Coal, or Albertitk. A bitu- 

 minous kind of Coal found in Nova Scotia, 

 and at Hillsborough, in New Brunswick. 



Analysis by Sltssor : 



Volatile matters . . . 54-39 

 Fixed carbon . . . 45-44 

 Ash 0-17 



ALBITE. 

 Oxygen and Sulphur . 

 Ash . 



1-21 

 0-17 



10000 



Carbon 



Hydrogen . 

 Nitrogen . 



57-25 

 9-62 

 1-75 



100-00 

 It j'ields, on distillation, 100 gallons of 

 crude oil per ton. See Melanasphalt. 



Ai,BiN, Werner. A white, opaque variety 

 of Apophyllite, found, associated with Na- 

 trolite, at Aussig, in Bohemia. 



Brit Mus., Case 27. 



Albite, Beudant, Brooke §" 3Iiller, Dana, 

 Phillips, Greg 8f Lettsom. Anorthic. Pri- 

 mary form a doubly-oblique prism. Occurs 

 generally in flat twin crystals. 



Colour. Usually Avhite; sometimes grey, 

 green, or brown. Translucent to opaque. 

 Lustre vitreous, pearly on cleavage planes. 

 Streak white. Brittle. Fracture uneven. 

 H. 6. S.G. 2-59 to 2-65. 



Fig. 5. 



Covip. Na si + Al Si' = silica 

 mina 19.5, soda 11-8=^100. 



B-7, dlu- 



Analysis by Abich, from Miask 





Silica 



68-45 



Alumina .... 



18-71 



Peroxide of iron 



0-27 



Soda ..... 



11-24 



Potash .... 



0-65 



Lime 



0-50 



Magnesia .... 



0-18 



Protoxide of manganese . 



trace 



100,00 

 BB behaves like Felspar, but imparts a 

 more distinct yellow colour to the flame. 

 Not acted on by hot acids. 



Localities. — English. Cornwall ; at Hue! 

 Friendship on Quartz, and in white translu- 

 cent crystals at Tintagel, near Camelford, 

 Fig. 5; Beverley, Yorkshire; in green- 

 stone, — Welsh: ' Tremadoc, Caernarvon- 

 shire — Scotch. Near Edinburgh, in green- 

 stone,— 7r«/artcf. In very perfect, white 

 translucent twin-crystals at Eoss, and in 

 the granite of Slieve Corra, one of the 

 Mourne Mountains, The forms found in 

 the United Kingdom are represented in 

 Fig. 5.— Foreign: The Tyrol, in large 

 transparent, colourless crystals, with 

 Pearl- spar ; St. Gotthard, in white translu- 

 cent twins; Arendal, in Norway, with 



