Popular science monthly . At left, view of aerial screen system and secondary apparatus for collecting charges. Atright, public demonstrating screen suspended thirty feet above ground by four poles. At left, spectators experimenting with apparatus. One boy is waving a vacuum right, Prof. Thordarson examining his one million-volt, sixty-cycle transformer Engineers are of course interested inthe details of construction of such atransformer, and some of the facts havebeen generously given by Mr. Thordar-son himself and by his assistant ando[)erating expert, Mr. A. S. laminat
Popular science monthly . At left, view of aerial screen system and secondary apparatus for collecting charges. Atright, public demonstrating screen suspended thirty feet above ground by four poles. At left, spectators experimenting with apparatus. One boy is waving a vacuum right, Prof. Thordarson examining his one million-volt, sixty-cycle transformer Engineers are of course interested inthe details of construction of such atransformer, and some of the facts havebeen generously given by Mr. Thordar-son himself and by his assistant ando[)erating expert, Mr. A. S. laminated iron magnetic circuit isarranged on the core t\pe, with bothprimary and secondary windings groupedupon one leg only. Horizontal membersare 120 ins. in length, the vertical ones40 ins., their section being 16 ins. by16 ins. Primary winding consists of122 coils of 44 turns each of copperribbon, .020 in. by .281 in. in section,i)iing the ef|ui\alent of a No. 12 romulwire. These coils are i)laced >4 , pairs being connected in series,lluii the 61 groups connected in parallellor receiving the 2,20o-\-olt supiil).When assemi)led, the primary portionlormed a cylinder 67 ins. long, 23 i
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
