- construction. A perspective view of it is shown in Fig. ity the telegraphers are indebted for many valuable im- trie nerves” which ramify the national telegraphic sys- 3. In order to be more easily understood, we shall first provements in their apparatus. The electro-magnet, B, tem. A very great… … perfect, have given place to new and more simple energy; on entering the office, therefore, it is conducted own instrument, and then show the manner of commu- agencies. It is our purpose in this article to describe into a ‘‘receiving magnet,” similar in principle to the nicating with other…
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