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THE PHONOGRAM 39 er, each prominent In its special domain. The first published a series of articles from the pen of the daughter of Professor Henry, Mary A. Henry, a lady whose eru- dition is only equalled by her filial devo- tion. The statements she here makes in defense of her father's claim cannot be. controverted, the proof, as laid down step by step, is irrefragable ; and if she had not been called upon by the powers that con- stitute that able organization called Tin: Electrical Engineer to perform this duty, other champions would have sprung up from American dust to declare the same. The polished writer, Di\ William If. Wahl, whose editorial on this subject occupies two col- umns in The Manufad- ^ ' urer and Builder, and whose friendship for tin* learned professor is an- nounced with commend- able pride, defends Hen- ry's title to the authorship of this discovery, and adds : 44 In view of the vast importance which the varied applications of magneto-elect rieitv have o v at the present day as- sumed in the electrical world, the publishers of The Metrical Engineer have felt that the time has come when an authentic chronicle of the re- searchesand discoveries of Professor Henrv in this interesting ami important field should be made known in the world" The Manufacturer and Builder pub- lishes the statement that when the dele- gates of the American institute of Elec- trical Engineers returned from the C’on- ress held in Frankfort, Germany, during the term of the Electrical Exhibition at that place, they made known to their countrymen the fact that when the propo- sition was made by the American repre- PKOFESSOR JOSEPH HENKY. 8 sentatives to name after Henry (in accord- ance with the custom which, has given us the ohm, the volt, the farad, etc.) an im- portant new unit applying to facts that he was the first to observe and investigate, the proposition failed of assent, and action thereon was postponed until the Chicago Electrical Congress of 1893, for the reason that many of the European delegates “ had never heard of Henry " If this as- tounding statement be true, as we believe it is. it should be the imperative dtity of the American Institute of Electrical En- gineers to see that these gentlemen are better informed respecting the services^of our distinguished coun- tryman before they reach Chicago.” The Electrical Engineer says: The developments of the last ten years have , rendered it as certain as any future event can be, that the introconvcrtibil- # ityof electricity and mag- netism, first made known * ty. the world in 1831, by the English philosopher, * Michael Faraday, is one of wIyeh the results are des- tined to be of greater 'importance to the welfare of the human race Ilian any other ever achieved by the mine! of man. * 1 cannot help thinking,' says Tymlall, the successor of Faraday in the Royal Institution of Great Britain. * that this great discovery of majjneto-el^ptricitv^is the greatest ex- perimental result ever obtained. It is tin* Mont Blanc of Faraday's own achieve- ments. lie always worked at great elqfa- tioifr, but higher than this he never attained/ J". * Now Professor Henrv mentioned re- m peatedly to his wife and daughters that he had made the discovery of the extra cur- w rent live y* are Ire fore Faraday .