404; Dr. Faraday's Researches in Electricity. [Series xx. 



so shaped them in the making, and drawn them off at the neck, 

 as to leave the aperture on one side, so that when filled with 

 liquid they required no closing. 

 2280. Rock crystal. 



Sulphate of lime. 

 Sulphate of baryta. 

 Sulphate of soda. 

 Sulphate of potassa. 

 Sulphate of magnesia. 

 Alum. 



Muriate of ammonia. 

 Chloride of lead. 

 Chloride of sodium. 

 Nitrate of potassa. 

 Nitrate of lead. 

 Carbonate of soda. 

 Iceland spar. 

 Acetate of lead. 

 Tartrate of potash and 



antimony. 

 Tartrate of potash and 



soda. 

 Tartaric acid. 

 Citric acid. 

 Water. 

 Alcohol. 

 iEther. 

 Nitric acid. 

 Sulphuric acid. 

 Muriatic acid. 

 Solutions of various 



alkaline and earthy 



salts. 



Glass. 



Litharge. 



White arsenic. 



Iodine. 



Phosphorus. 



Sulphur. 



Resin. 



Spermaceti. 



Caffeine. 



Cinchonia. 



Margaric acid. 



Wax from shell-] 



Sealing-wax. 



Olive-oil. 



Oil of turpentine. 



Jet. 



Caoutchouc. 



Sugar. 



Starch. 



Gum-arabic. 



Wood. 



Ivory. 



Mutton, dried. 



Beef, fresh. 



Beef, dried. 



Blood, fresh. 



Blood, dried. 



Leather. 



Apple. 



Bread. 



ac. 



2281. It is curious to see such a list as this of bodies pre- 

 senting on a sudden this remarkable property, and it is strange 

 to find a piece of wood, or beef, or apple, obedient to or re- 

 pelled by a magnet. If a man could be suspended, with suf- 

 ficient delicacy, after the manner of Dufay, and placed in the 

 magnetic field, he would point equatorially; for all the sub- 

 stances of which he is formed, including the blood, possess 

 this property. 



2282. The setting equatorially depends upon the form of 

 the body, and the diversity of form presented by the different 

 substances in the list was very great; still the general result, 

 that elongation in one direction was sufficient to make them 

 take up an equatorial position, was established. It was not 



