PHILOSOPHICAL TRANSACTIONS. 
I. The Bakerian Lecture. — Experimental Researches in Electricity . — Twenty-second 
Series. By Michael Faraday, Esq.,D. C.L., F.R.S., Fullerian Prof. Chem. Royal 
Institution, Foreign Associate of the Acad. Sciences, Paris, Ord. Boruss. Pour le 
M6rite, Fq., Memh. Royal and Imp. Acadd. of Sciences, Petershurgh, Florence, 
Copenhagen, Berlin, Gottingen, Modena, Stoehholni, Munich, Bruxelles, Vienna, 
Bologna, 8)C. ^c. 
Received October 4, — Read December 7, 1848. 
28. On the cry^aUine polarity of bismuth and other bodies, and on its relation to the 
magnetic foirn of force. 
^ i. Crystalline polarity of bismuth. ^ li. Crystalline polarity of antimony. 
V ^ iii. Crystalline polarity of arsenic. 
2454. Many results obtained by subjecting bismuth to the action of the magnet 
have at various times embarrassed me, and I have eitiier been contented with an im- 
perfect explanation, or have left them for a future examination : that examination I 
have now taken up, and it has led to the discovery of the following results. I 
cannot, however, better enter upon the subject than by a brief description of the ano- 
malies which occurred, and which may be obtained at pleasure. 
2455. If a small open glass tube have a bulb formed in its middle part and some 
clean good bismuth be placed in the bulb and melted by a spirit-lamp, it is easy 
afterward, by turning the metal into the tubular part of the arrangement, to cast it 
into long cylinders : these are very clean, and when broken are seen to be crystal- 
lized, usually giving cleavage planes, which run across the metal. I prepare them 
from 0'05 to OT of an inch in diameter, and, if the glass be thin, usually break both 
it and the bismuth together, and then keep the little cylinders in their vitreous cases. 
2456. Taking some of these cylinders at random and suspending them horizontally 
between the poles of the electro-magnet (2247.), they presented the following phe- 
MDCCCXLIX. 
B 
