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II. Experimental Researches in Electricity. — Twenty-second Series {continued). 
By Michael Faraday, Esq., D.C.L., F.R.S., Fullerian Prof. Chem. Royal Insti- 
tution, Foreign Associate of the Acad. Sciences, Paris, Ord. Boruss. Pour le Mdrite, 
Eq., Memh. Royal and Imp. Acadd. of Sciences, Petersburgh, Florence, Copenhagen, 
Berlin, Gottingen, Modena, Stockholm, Munich, Bruxelles, Vienna, Bologna, 8fc. Sfc. 
' Received October 31, — Read December 7, 1848. 
§ 28. On the crystalline polarity of bismuth and other bodies, and on its relation to 
the magnetic and electric form of force {continued). 
^ iv. Crystalline condition of various bodies. ^ v. Nature of the magnecrystallic 
force, and general observations. 
^ iv. Crystalline condition of various bodies. 
2535. Zinc. — Plates of zinc broken out of crystallized masses gave irregular 
indications, and, being magnetic from the impurity in them, the effects might be due 
entirely to that circumstance. Pure zinc was thrown down electro-chemically on 
platina from solutions of the chloride and the sulphate. The former occurred in 
ramifying dendritic associations of small crystal; the latter in a compact close form. 
Both were free from magnetic action and freely diamagnetic, but neither showed 
any trace of the magnecrystallic action. 
2536. Titanium*. — Some good crystals of titanium obtained from the bottom of 
an iron furnace, were cleansed by the alternate action of acids and fluxes until as 
clear from iron as I could procure them. They were bright, well-formed and mag- 
netic ( 2371 ), and contained iron, I think, diffused through their whole mass, for 
nitro-muriatic acid, by long boiling, continually removed titanium and iron from 
them. These crystals had a certain magnetic property which I am inclined to refer 
to their crystalline condition. When between the poles of the electro-magnet, they 
set ; and when the electric current was discontinued, they still set between the poles 
of the enfeebled magnet as they did before. If left to itself a crystal always took the 
same position, showing that it was constantly rendered magnetic in the same direc- 
tion. But if a crystal was placed and kept in another position between the magnetic 
poles whilst the electric current was on, and afterwards the current suspended, and 
then the crystal set free, it pointed between the poles of the enfeebled magnet in this 
new direction ; showing that the magnetism was in a different direction in the body 
* For these and many other crystals I am indebted to the kindness of Sir Henry T. De la Beche and 
Mr. Tennant. 
D 2 
