646 



INORGANIC OE MINERAL KINGDOM. 



Borate of Ammonia. 



of Soda (borax). 

 Carbonate of Lime (from urine of 

 horse), 

 of Potass, 

 of Soda. 

 Chlorate of Potass. 

 Chloride of Barium, 

 of Cobalt, 

 of Sodium. 

 Cholesterine. 

 Chromate of Potass. 

 Citric Acid. 

 Cyanide of Mercury. 

 Granite (transparent sections). 

 Hypermanganate of Potass. 

 Iodide of Potassium. 



of Quinine. 

 Mannite. 

 Murexide. 



Muriate of Ammonia. 

 Nitrate of Ammonia, 

 of Barytes. 

 of Bismuth, 

 of Copper, 

 of Potass, 

 of Soda, 

 of Strontian. 



Nitrate of Uranium. 

 Oxalic acid. 

 Oxalate of Ammonia, 

 of Chromium, 

 of Lime, 

 of Potass, 

 of Soda. 

 Oxalurate of Ammonia. 

 Phosphate of Ammonia. 



Ammoniaco-Magnesian (tri- 

 ple, of urine), 

 of Soda. 

 Prussiate of Potass (red). 



(yellow). 

 Salicine. 



Sulphate of Ammonia, 

 of Cadmium, 

 of Copper. 



of Copper, ammoniated. 

 of Iron, 

 of Magnesia, 

 of Potassa. 

 of Soda, 

 of Zinc. 

 Tartaric Acid. 

 Uric Acid. 

 Urate of Ammonia, 

 of Soda. 



456. It not unfrequently happens that a remarkably beautiful 

 specimen of crystallization developes itself, which the observer 

 desires to keep for display. In order to do this successfully, it 

 is necessary to exclude the air; and Mr. "Warington recommends 

 castor-oil as the best preservative. A small quantity of this 

 should be poured on the crystallized surface, a gentle warmth 

 applied, and a thin glass cover then laid upon the drop, and 

 gradually pressed down ; and after the superfluous oil has been 

 removed from the margin, a coat of marine glue or other varnish 

 is to be applied. 



457. Although most of the objects furnished by Vegetable 

 and Animal structures, which are advantageously shown by- 

 Polarized light, have been already noticed in their appropriate 

 places, it will be useful here to recapitulate the principal, with 

 some additions. 



Vegetabh. 

 Cuticles, Hairs, and Scales, from 



Leaves {^ 220, 246). 

 Fibres of Cotton and Flax. 

 Raphides (| 2,S0). 



Spiral cells and vessels (|J 228, 232). 

 Starch grains (| 229). 

 Wood, longitudinal sections of, 



mounted in balsam (^ 239). 



Animal. 

 Fibres and Spicules of Sponges ( J 

 296). 



Polypidoms of Hydrozoa (§ 305). 

 Polyzoaries (§ 330). 

 Spicules of Gorgoniffi (§ 309). 

 Tongues (Palates) of Gasteropods 



(I 347). 

 Scales of Fishes (|? 408, 409). 

 Sections of Hairs (1 411). 



of Quills (§412). 



of Horns (? 413). 



of Shells (§336). 



of Skin (§ 418). 



of Teeth (§§406,407). 



of Tendon, longitudinal. 



