c sys- 3. In order to be more easily understood, we shall first provements in their apparatus. The electro-magnet, B, tem. A very great advancement has been made in the describe the manner in which the operator prints on his is firmly secured to the base, A, which is about four art of electric… … 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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