Van Nostrand's engineering magazine . istance than fifty miles. 1(54 VAN NOSTRANDS ENGINEERING MAGAZINE. depends to a certain extent upon the depthat which the plate is buried. Thus, adeep plate would disperse its charge inall directions by an ever-increasing spheri-cal surface up to the limit of a spherewhose radius is equal to the depth of theplate underground, and afterwards by asegment of an ever-increasing sphere,which segment would always in this casebe larger than, but would gradually ap-proximate, the atmosphere. These ac-tions are roughly shown on Fig. 12 : much as the contact between
Van Nostrand's engineering magazine . istance than fifty miles. 1(54 VAN NOSTRANDS ENGINEERING MAGAZINE. depends to a certain extent upon the depthat which the plate is buried. Thus, adeep plate would disperse its charge inall directions by an ever-increasing spheri-cal surface up to the limit of a spherewhose radius is equal to the depth of theplate underground, and afterwards by asegment of an ever-increasing sphere,which segment would always in this casebe larger than, but would gradually ap-proximate, the atmosphere. These ac-tions are roughly shown on Fig. 12 : much as the contact between an ironplate, of whatever form, and coke looselysurrounding it must frequently be dis-continuous, and as the conductivity ofcoke in a mass composed of loose parti-cles must be very much lower than thatof a solid piece, the above surface shouldin practice be a minimum. The total surface may, however, be di-vided if a number of earths be used. The outer surface which should begiven to the coke must depend very Fig. 13 JPWiWMMwM GROUND.
Size: 2228px × 1122px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
