ie an sibel 
THE 
AMERICAN 
JOURNAL OF SCIENCE, &c. 
Art. 1—A_ Deseription ofa e Misaotic Electrical Machine, in- 
vented by E. M. Cuarxe, Magnetician, No. 11, Lowther Arcade, 
Strand, London. 
Tuts apparatus, with the exception of there being rotating arma- 
tures and a magnetic battery, differs from any magnetic machine 
which has hitherto been constructed. 
The October number of the Philosophical Magazine* for 1836, 
contains a brief account of this machine; it being the intention of 
the inventor to reserve a more detailed description for insertion in 
the “Annals,”+ in consequence of its being the aim of the Editor 
of the latter named periodical to make this deservedly interesting 
branch of science one of the leading features of that work. Since 
that time, a most important improvement has been made, by the 
rejection of the mercury box. By the inventor’s present arrange- 
ment, the necessity of using mercury is superseded. Fig. 1. 
A, is the battery of bent bar magnets, placed vertically, and rest- 
ing against four adjusting screws, which pass through the mahogany 
back board B, (two of them are shown at M, N, fig. 12.) C is a- 
bar of stout brass, having an opening in the middle, through which 
passes a bolt with a screw-nut, the purpose of which is to draw the 
magnetic battery to the board B. By these means, the battery can 
readily be disengaged from the machine, without taking asunder the 
entire apparatus, and the battery is thus also freed from that vibra- 
* Lbeg leave also to direct _ shention of your readers to No. 55, p. 360, and 
No. 63, p. 455, of the same Magaz 
+ The Annals of Electricity, vablished by Mr. Sturgeon, at oe England, 
and in which this communication was originally published. It has been recently 
sent with the stereotype hee, to the Editor, for republication in this Journal, 
28 
Vou. XX XIL—No. 
