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chanlcal effects ; but as a description of this was not printed, I do not 

 place it in the same category with the experiments of which I published 

 an account, or the facts which could be immediately deduced from my 

 papers in Silliman's Journal. 



From a careful investigation of the history of electro-magnetism in its 

 connection with the telegraph, the following facts may be established : 



1. Previous to my investigations the means of developing magnetism in 

 soft iron were imperfectly understood, and the electro-magnet which then 

 existed was inapplicable to the transmission of power to a distance. 



2. I was the first to prove by actual experiment that, in order to de- 

 velop magnetic power at a distance, a galvanic battery of intensity must 

 be employed to project the current through the long conductor, and that 

 a magnet surrounded by many turns of one long wire must be used to 

 receive this current. 



3. I was the first actually to magnetize a piece of iron at a distance, 

 and to call attention to the fact of the applicability of my experiments to 

 the telegraph. 



4. I was the first to actually sound a bell at a distance by means of the 

 electro-magnet. 



5. The principles I had developed were applied by Dr. Gale to render 

 Morse's machine efiective at a distance. 



The results here given were among my earliest experiments ; in a 

 scientific point of view I considered them of much less importance than 

 what I subsequently accomplished ; and had I not been called upon to 

 give my testimony in regard to them, I would have suflTered them to 

 remain without calling public attention to them, a part of the history of 

 science to be judged of by scientific men who are the best qualified to 

 pronounce upon their merits. 



