﻿30 



PICTORIAL MISCELLANY. 



weights, or one hundred and twelve pounds, more than some bo\ r a 

 could lift. But the instant the magnetic current is broken, it ceases 

 to be a magnet, and has no more power than a piece of wood or 

 stone. Repeat the experiment as often as you will, the result will 

 be the same. I want you to impress this strongly upon your minds, 

 for it is, in fact, a very important part of the subject. Why the fact, 

 that a current of electricity running round a bar of iron should make 

 it a magnet, no one can tell. We only know that it is so. We 

 now come to the 



RECORDING APPARATUS. It consists of an electro-magnet and a 

 lever mounted or balanced upon a stand. At the right hand end 

 of the lever, and directly over the electro-magnet, is fastened a 

 piece of soft iron, and upon the left hand end there i-s a blunt point, 

 which marks the strip of paper when the electro-magnet is in action. 

 Upon the extreme right hand of the stand you will notice two screw- 

 cups, with openings on the top to receive the wires from the battery. 

 These cups are both connected with the electro-magnet by the 

 wires. Now if one wire from the battery is placed into one of these 

 screw-cups, and the other wire is attached to the remaining cup, the 

 galvanic connection is complete, and the current of electricity, in 

 order to get back from the copper plate in the battery to the zinc 

 one, must pass round the electro-magnet a great number of times. 

 This, as T have before stated, now becomes a powerful magnet, and 

 attracts the piece of iron upon the right hand end of the lever. The 

 left hand end is thrown up against the strip of paper, and the blunt 

 point makes a mark upon it. This is the instrument which writes 

 the letters. The large cut at the beginning of this article is only 

 the recording apparatus with some clock-work attached, to wind off 

 the paper as it is written upon. The next cut represents the 



