. Forrester's pictorial miscellany for the family circle . The large cut will show you, at aglance, all the various parts of the tele-graph together. The left hand part ofthe cut is supposed to be the office inBoston, with the battery and signal key;and the ri^ht hand side the office in NewYork, together with the recording appa-ratus. The distance between them issupposed to be two hundred and thirtymiles. I cannot represent this greatspace upon one page, so you must imag-ine it. When it can be done, these wiresare extended along upon the side ofsome rail-road, a representation of whichyou will
. Forrester's pictorial miscellany for the family circle . The large cut will show you, at aglance, all the various parts of the tele-graph together. The left hand part ofthe cut is supposed to be the office inBoston, with the battery and signal key;and the ri^ht hand side the office in NewYork, together with the recording appa-ratus. The distance between them issupposed to be two hundred and thirtymiles. I cannot represent this greatspace upon one page, so you must imag-ine it. When it can be done, these wiresare extended along upon the side ofsome rail-road, a representation of whichyou will see upon the cut. Now observe, that it wants only thesmall place on the signal key to be unitedin order to complete this great press down the knob and instantly the , THE MAGNETIC TELEGRAPH. current is in motion. Quick as thought it has gone to New York,and, passing round the bar of iron, it becomes a powerful magnetand attracts the iron above it. This throws the point upon theother end of the lever upwards, and a mark is made upon thepaper li
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Keywords: ., booka, bookcentury1800, bookdecade1850, booksubjectnaturalhistory
