Van Nostrand's engineering magazine . Fig. THE POTTERIES SHELTON CHURCH struck 1880. - such a height that the rod may project | In 1854, however, the next Commission,from 15 to 20 feet above the top of the , with M. Pouillet as reporter, no longerbuilding. It is also advisable to have ! supported this rule. The report says : 158 VAJST nostrands engineeeino magazine. At the end of the last century it was a gen-erally accepted opinion that the circle protectedby a conductor possessed a radius equal totwice the height of the point. The Instructionof 1829 (Gay-Lussac, rapporteur) having foundt
Van Nostrand's engineering magazine . Fig. THE POTTERIES SHELTON CHURCH struck 1880. - such a height that the rod may project | In 1854, however, the next Commission,from 15 to 20 feet above the top of the , with M. Pouillet as reporter, no longerbuilding. It is also advisable to have ! supported this rule. The report says : 158 VAJST nostrands engineeeino magazine. At the end of the last century it was a gen-erally accepted opinion that the circle protectedby a conductor possessed a radius equal totwice the height of the point. The Instructionof 1829 (Gay-Lussac, rapporteur) having foundthat practice established, adopted it with cer-tain reservations. . These rules . . reston much that is arbitrary. . and theycannot be laid down with any pretense to accu-racy, since the extent of the area of protectionin each case is dependent on a multitude ofcircumstances. It is the more necessary to make thisquotation, because an attempt has recent-ly been made by Mr. Preece to revive thetheory in a modified form. In a paperwhich
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
