Objects for the Microscope. 



225 



It is split into thin laminae, and mounted on glass slides 

 for the polariscope, and upon the thickness of the film 

 depends the colour. 



The following list of crystals may direct the student to 

 many interesting specimens : * 



Acetate of Copper. 



Acetate of Manganese. 



Acetate of Soda. 



Acetate of Zinc. 



Acetate of Lead. 



Agate, transparent sections. 



Alum. 



Arseniate of Potass. 



Bicarbonate of Potassium. 



Bichromate of Potassium. 



Borax, or Birate of Soda. 



Boracic Acid. 



Bismuth. 



Carbonate of Potass. 



Carbonate of Lime. 



Carbonate of Soda. 



Chlorate of Potass. 



Chloride of Barium. 



Chloride of Cobalt. 



Chloride of Sodium. 



Citric Acid. 



Dent-iodide of Mercury. 



Granite, transparent sec- 

 tions. 



Hydrochlorate or Muriate of 

 Ammonia. 



Iodide of Potassium. 



Iodide of Quinine. 

 Nitrate of Ammonia. 

 Nitrate of Baryta, 

 Nitrate of Bismuth. 

 Nitrate of Copper. 

 Nitrate of Soda. 

 Nitrate of Uranium. 

 Oxalic Acid. 

 Oxalate of Lime. 

 Oxalate of Ammonia. 

 Oxalate of Potass. 

 Oxalate of Soda. 

 Phosphate of Ammonia. 

 Phosphate of Soda. 

 Salicine. 



Sulphate of Ammonia. 

 Sulphate of Copper (Blut 



Vitriol). 



Sulphate of Iron. 

 Sulphate of Magnesia 



(Epsom Salts). 

 Sulphate of Soda, 

 Sulphate of Zinc. 

 Sulphate of Nickel. 

 Sulphate of Cadmium. 

 Tartaric Acid. 

 Uric Acid. 



The formation of Crystals under the microscope may be 

 watched with the greatest facility. A little common salt 

 (chloride of sodium) dissolved in water, and a drop of the 

 solution placed on a glass slide gently heated over a spirit 

 lamp, or by applying the corner of the slide to the candle, 



* These are mounted for the Polariscope by Mr. Topping. 



