Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 428
every one of the typesof dynamos in that building. I need hardly say to those acquaintedwith the history of electricity that I was looking at a small compassneedle, and that the bust was that of the late Professor Oersted, ofCopenhagen. For many years people were aware that there was some hidden… … Fig. 2.—Action of an electric current on a compass needle. compass needle and reversed its polarity it showed that there was someconnection between electricity and magnetism, but no one could tellwhat that connection was. jSIathematics were of no avail in the solu-tion of this problem. Oersted…
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