LIST OF OBJECTS FOR THE POLARISCOPE. 
93 
VEGETABLE. 
y Starch, Potato, 
X Starch, Arrowroot, 
Starch, Custard -powder, 
X Starch, Indian-corn, 
Starch, Tous les Mois, 
Gun-cotton, 
y Hairs from leaf of Deutzia, 
i Hairs from leaf of Elaeagnus, 
Hairs from leaf of Olive, 
Hairs from leaf of Cactus, 
Raw Cotton, ^ 
Raw Flax, ^ 
Siliceous Cuticle of Bamboo, 
Siliceous Cuticle of Eqiiisetum, 
Siliceous Cuticle of Rice, 
Siliceous Cuticle of Wheat, 
Raphides, 
Spiral Cells and Vessels, 
Wood, longitudinal sections mount- 
ed in balsam. 
y Agate, 
Arragonite, 
X Asbestos, 
Adventurine, 
Granite, 
Marble, 
y Selenite films. 
MINERAL. 
Sea sand, 
Tremolite, 
Satin Spar, 
Sandstone^ 
Feldspar, 
Crystals (of Titanic Iron, ?) in some 
varieties of mica. 
CRYSTALS, VIZ: 
Acetate of Copper, 
Bichromate of Potash, 
y Borax, 
Boracic Acid, 
Borate of Ammonia, 
Borax and Phosphoric Acid, 
Carbonate of Lime, 
Chromate of Potash, 
Chlorate of Potash, 
Cholesterine, 
Nitric Acid, 
Epson Salts, 
Oxalic Acid, 
Oxalate of Ammonia, 
Oxalate of Chromium, 
Oxalate of Lime, 
Oxalate of Soda, 
Nitrate of Ammonia, 
Nitrate of Baryta, 
Nitrate of Lead, 
Nitrate of Potash, 
Nitrate of Soda, 
Phosphate of Soda, 
Salicine, % 
Sugar, 
Sugar of Milk, 
Sulphate of Cadmium, 
Sulphate of Copper, 
Sulphate of Magnesia, 
Sulphate of Nickel, 
Tartaric Acid, ' 
Tartrate of Lime, 
Uric (or Lithic) Acid, ^ 
Triple Phosphate. 
CATALOGUE OF ACHROMATIC MICROSCOPES. 
