Te J 1 
TABLE 30. THE PROBABLE USEFUL LIFE OF VARIOUS 
ARTICLES (Concluded) 
Description. Pape Residual Authority. Remarks. 
Years 
Wire (continued) 
Bare... ise se dc ee ra IS 35% P.G.&E. Co. S.PF. rate hearings, 1913-14. 
insulated. co iianidl dl ud, 20 15% P.G.& E. Co. 8S. F. rate hearings, 1913-14. 
copper, weatherproof....... 13 Arbitrators Ata. St. Lgt. Controversy. 
copper, weatherproof....... 16 Wis. R. R. Com. Quoted by Henry Floy. 
copper, weatherproof....... I10-I5 Foster ‘“ Eng. Valuation,” etc. 
2-kv. distribution......... 15 S.J]. L. &P. Cor. Cal. R. R. Com. rate hearing. 
4-kv. distribution. ........| 15 S.J.L.&P. Cor. Cal. R. R. Com. rate hearing. 
10-kv. distribution........| 20 S.J. L.&P. Cor Cal. R. R. Com. rate hearing, 
telephone, iron........... | 10 0% Wis. R. R. Com Wisconsin Tel. Co. Case. 
telephone, iron............| 8-15 Wis. R. R. Com. Quoted by H. A. Foster. 
telephone, weatherproof, 
fron. id die ii dR X85 Wis. R. R. Com. Quoted by H. A. Foster. 
telephone, copper. ........ 20 75% Wis. R. R. Com Wisconsin Tel. Co. Case. 
telephone exch., bare copper! 10-15 40% Tel. * Data” Quoted by H. A. Foster. 
telephone exch., insul. cop. 10 10% Tel. *“ Data” Quoted by H. A. Foster. 
telephone exch., bare iron. 8-10 o% Tel. * Data ™ Quoted by H. A. Foster. 
telephone toll, bare copper. 40 49% Tel. * Data” Quoted by H. A. Foster. 
telephone toll, bare iron. .. 15 % Tel. * Data” Quoted by H. A. Foster. 
telephone, distribution..... 10 15% Wis. R. R. Com. Wisconsin Tel. Co. Case. 
ABLES 43