222 Description of a Magnetic Electrical Machine. 
rotary motion will be produced by this arrangement, the current 
being constantly in the same direction. But the experiment may 
be varied by substituting the double break H, (fig. 1,) the currents 
now alternating.* 
To ignite Charcoal. 
Fig. 11, represents the arrangement of the apparatus for this pur- 
pose. The same directors that are used to hold the sponges, may 
be used to retain the charcoal points A, B, in the proper position. 
Fig. 12, shows the compactness of the machine. H, a mahogany 
case sliding on the bottom board Y, which locks against the back 
board B. ‘The muliplying wheel is to be turned in the direction of 
the arrow G. D, the pulley, and C the mandril that carries the ar- 
matures. 
E. M. Clarke on the occasion of his last visit to Paris, had the 
honor to exhibit the effects of the magnetic machine which forms 
ihe subject of the present paper, to several of the French savans, 
all of whom were pleased to express their unqualified approbation. 
M. le Baron Seguier, brought the inventor to the French Institute, 
accompanied by M. Chevalier. Amongst others present, during 
the exhibition of the machine, were MM. Melloni, Dulong, Savary, 
and Becquerel. Prof. Arago, who was that day officially engaged, 
having heard the result of the experiments with the machine, re- 
quested the inventor to attend the day following at the Observa- 
tory, which he did; and that learned professor also expressed his 
satisfaction. On the day following, in consequence of a note receiy- 
ed from M. Pouillet, he attended at the Conservatory of Arts and 
Sciences, when that learned professor, who, of course was well 
acquainted with the previous magnetic machines, as Pixii’s, New- 
man’s, (the name by which Saxton’s machine is known on the con- 
* A singular fact connected with this experiment is the rotation of the two wire 
frames in the same direction, owing to passages of the electricity from one of the 
wire frames into one pole of the magnet, and then from the other pole of the mag- 
net down the other frame. 
