. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 0 100 200 300 400 500 600Amperes 1 1 i^ Jr 25 CY CLE8 -to. > U - ^;^u t ^ / / Y / A ^ // J. loom _ - — J -A J _ ; ^ 0 ^ 90 S 80 I 70 2,0^ (3 300 400Amperes 0 100 200 300 40U SOO Amperes 0 15 30 45 1 hr. 15 30 45 2 hr. 1530 45 3 hr. 15Time. 1 1 1 pcrc LES 1 1 1 Pox ver ll^ ptm . - Ir IT). I) . es^ — ~ ^ / - y y _j -^ ,^a1 3to ) ^ rH^ _ 6 I |35 5 13 o 4 I £30 3^H 2 .2 25 l| 0 20 1 1 1 X) CYCLES JtsS / ^ -J u^1 ^>^ A S^ /■ / Ro )m L_ — — — 0 15 30 451 hr. 15
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 0 100 200 300 400 500 600Amperes 1 1 i^ Jr 25 CY CLE8 -to. > U - ^;^u t ^ / / Y / A ^ // J. loom _ - — J -A J _ ; ^ 0 ^ 90 S 80 I 70 2,0^ (3 300 400Amperes 0 100 200 300 40U SOO Amperes 0 15 30 45 1 hr. 15 30 45 2 hr. 1530 45 3 hr. 15Time. 1 1 1 pcrc LES 1 1 1 Pox ver ll^ ptm . - Ir IT). I) . es^ — ~ ^ / - y y _j -^ ,^a1 3to ) ^ rH^ _ 6 I |35 5 13 o 4 I £30 3^H 2 .2 25 l| 0 20 1 1 1 X) CYCLES JtsS / ^ -J u^1 ^>^ A S^ /■ / Ro )m L_ — — — 0 15 30 451 hr. 15 30 45 2 hr. 15 30 hr. 16Time. 1 1 15 CY CLES PC we xF ictc r _ — L — ■^ It ip. res ^ f— — - .-^ y^ ,^ -- .\^ to^J H -^VTI O 40 o a o4 p. £ 30 35 ^ 1 1 1 1 15 CYC LE 3 ^^^ ^ 4>. f <!^ ^i^ & Va <^- // ^ w ^ Ro^ ,m ^ . 0 15 30 451hr 15 30 45 2 hr. 15 30 45 3 hr. 0 100 200 300 400Amperes Fig, 121, — General Data Runs. 5 to 8. 56 lb. Rail, A. C. Rail Tests. 406 ELECTRIC RAILWAY TEST COMMISSION tains the same data as the preceding one, except that the fre-quency has beengiven prominence instead of the current. Fig. 124 shows the ratio of () impedance to () resis-tance, plotted against frequency. While these data do not yieldas smooth curves as those shown in the preceding sheet, the > AKI\ / y / 400 / y / / / / / 350 ^/ / / ^ i f / QArt f ./ ^ ^ / / A / y / / 1 y / / / r— / # / 1 / ^/ ^ 1 / / ^ ^ / / / ntf>^ f\ r 1 / y ^ 100 1/ / y ptP* ^^ r- / / ^ t^ tt^ 0 / ^ / ^ 100 Sn3 ereB, — — d 0 10 20 30 40 £0 60 Cycles per secoad Fig. 122. — Frequency Drop Curves, 56 lb. Rail, A. C. Rail Tests. curves illustrate the general tendency of this ratio to increasewith the frequency. Fig. 125 shows the same ratio plotted against amperes perrail, the frequency remaining constant for a given curve. Fig. 126 shows the relation of th
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