Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1385
or eight feet in the earth. A more satisfactory method of making a ground is todrive a number of 1-inch iron pipes six or eight feet intothje earth at several points about the station^ connectingall these pipes together by means of copper -wire or pref:erably copper ^rip. A quantity of salt should… … Fig. 643 horn gap installation for 35,000 volt aluminum lightningarresters, schenectady power co., showing roof en-trances to station and wall entrances to lightningarrester tower. one set of arrestersdisconnected Lightning Arresters 1351 and also to any water mains^ metal flumes, or trolley…
