Magneto-Electric Multiplier. 



275 



Art. XII. — Magneto-Electric Multiplier ; by Charles G. Page, 

 M. D. Washington City, D. C. 



In Vol. XXXIV, No, 2, of this Journal, a new instrument was de- 

 scribed to which I gave the name of Magneto-Electric Multiplier, 

 from its affording a method of increasing the ordinary magneto- 

 electric power of an electro-magnet. The instrument here repre- 

 sented (Fig. 1,) was invented about the same time with the former, 



Fig. 1. 



r s 



and is much its superior for magnetic electrical experiments, but 

 it does not answer so well for the exhibition of independent rota- 

 tions. The only difference in the construction of the two ma- 

 chines, is in the form of the magnets. The U form magnet of 

 the first machine, is better adapted for the display of magnetic 

 power, but does not afford so delicate a test of weak magnetic 

 electrical currents as the straight magnet, as the hardness and 

 irregular texture of the iron at the bend of the U form magnet, 

 and the proximity of its poles, tend to retard the neutralization of 

 magnetic forces, and consequently to diminish the magneto-elec- 

 tric current,* The magnet be, is about six inches in length, and 

 half an inch in diameter before it is covered. For machines of 

 this description, the magnet should not much exceed this in length 



* For a full explanation of the action of this instrument, the reader is referred to 

 Vol. xxxivj, No. 2. 



