Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 143
total surface 450 sq. in.), with hole near edgetapped for 24 inch pipe- This plate may be used inplace of the driving point and should be buried at thefoot of pole, and the necessary length of pipe attached. 144 ELEMENTARY ELECTRICITY It may be buried at the bottom of pole before the pole isset,… … 0/AG&AAS SHOW/NG METHOD OFGROUNDINGPOLE ARRESTERS £LECTRIC RAILWAYS0ARK)N:DAN1ELSC2- KEOKUK-, I A.U.S. Fig. 60. The rail alone will not suffice, as it may be up on arock road-bed, or buried in cement or a soil that does notprovide a low resistance path for the lightning. With aconnection to…
Electricity
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