542 Intelligence and Miscellaneous Articles. 



electro-magnets, and in such manner that the currents of electricity- 

 having: caused the first electro- magnet to attract its armature, are 

 cut off therefrom, and caused to pass to the next electro-magnet, 

 and so on in regard to the eight electro-magnets and their armatures ; 

 each armature before being attracted will have been brought by the 

 movement of the bar or instrument to within about a quarter of an 

 inch of its electro-magnet, the bar coming at each step of its move- 

 ment nearer and nearer to the electro-magnets, which it is enabled to 

 do by the stems of those armatures which have been previously 

 attracted, being enabled to slide back freely through the bar or instru- 

 ment which carries them. The stems of the armatures are enabled to 

 draw the bar or instrument towards the electro -magnets (when their 

 armatures are attracted by reason of the stems having projecting 

 heads or end), which prevent the stems from being drawn through 

 the bar or instrument which carries them, whereby, when all the 

 electro-magnets have attracted their armatures, the bar or instru- 

 ment will have been moved two inches or other distance according 

 as arrangement is made for each of the electro-magnets to act 

 through a less or larger space than a quarter of an inch. It will be 

 evident that this bar or instrument may be arranged to give motion 

 to machinery in various ways ; but I believe the most convenient 

 mode of applying the power thus derived from electro-magnets, will 

 be found to be to affix one bar or instrument, such as herein de- 

 scribed, to one end of the rod of a piston working in a cylinder, and 

 another such bar or instrument to the other end of the piston-rod, 

 the piston being in the middle of the piston-rod, and the piston-rod 

 working through stuffing-boxes on the covers at either end of the 

 cylinder. Each such bar or instrument is to be fixed in the manner 

 of a cross-head to the piston-rod, and to be guided in its movement 

 to and fro, and is to be provided with armatures on stems as herein 

 described, and sets of electro-magnets to attract the same, and 

 capable of being brought into action in succession, as above explain- 

 ed, and as will be readily understood by workmen accustomed to 

 making electro-magneto apparatus ; by which means the piston in 

 the cylinder may be moved first in one direction and then in the 

 other. In order that the armatures may be in a position to act cor- 

 rectly, the ends of their stems, when being moved back towards the 

 cylinder, should come against a stop or stops to move the heads or 

 enlarged ends of the stems to the bar or instrument which carries 

 them ; they will thus be brought into position to be again acted on 

 by their electro-magnets so soon as the electro-magnets have, by 

 attracting their armatures, drawn the piston, as far as it can go, in 

 the other direction. As a piston, by such means, cannot with con- 

 venience be caused to move through an extended length of space, 

 the cylinder is to be of comparatively large diameter to its length, 

 and at either end it is to have passages for the water or other fluid 

 (contained in the cylinder) to pass into and from the ends of another 

 cylinder of less diameter, but of proportionably greater length, in 

 which a piston also works ; and I prefer that the piston-rod of such 

 second cylinder should also work through stuffing-boxes at either 

 end of that cylinder; such piston-rod communicating the power 



