346 J. Nicklés on Different Applications of Magnetic Attraction. 
emergence. ‘These contrary effects of magnetisation and demag- 
netisation, and subsequently of inversion of the fluid, might be 
made of use, if contrary to the fact, the rim was made of soft 
iron, having no coercitive force. Hence, at each revolution, the 
wheel is subject to double magnetic work, which is unequal, and 
must give to the resultant of the magnetic actions, a position of 
equilibrium different from that existing when the wheel is at rest. 
At rest, the wheel does not differ from an ordinary electro-mag- 
net; like it, it is divided into two parts magnetically distinct ; 
the turns of its helix are parallel to the plane of the armature ; 
the resultant of the -magnetic actions developed by the helix is 
perpendicular to this plane, and passes by the centre of gravity 
of the helix. The position of the pole is then subordinate to 
that of the helix. If the former is displaced 0:33 meter it is only 
necessary to move the helix forward a corresponding quantity to 
remedy the displacement of the pole, which will be easily man- 
aged, if no other improvement is required. 
One of the most important improvements consists in the possi- 
bility of bringing into simultaneous action the two magnetic poles, 
to profit by the increase of force that always takes place when 
both poles act together on an armature. The trial reported by 
he researches which I have here described, constitute the first 
part of my experiments. It would have been difficult to have 
carried them thus far, if I had not found in one of the most dis- 
tinguished engineers of France, a Maecenas who appreciated at 
first sight the importance of my labors, and by a rare generosity 
enabled me to undertake these researches. M. Bazaine, in whose 
life many facts of the kind might be mentioned, needed not this 
new act of disinterestedness, that his love of progress should be 
nown. e€ was among those who introduced railroads into 
France, and he gave the country its first great road, that from 
Strasbourg to Basle. 
* Vol. xv, p. 104, Jan, 1853, and p. 880, May. 
