TA 3 oo 
TABLE 30. THE PROBABLE USEFUL LIFE OF VARIOUS 
ARTICLES (Continued) 
Description. Espoct| Ratu) Authority. Remarks. 
Years 
Engines (continued) 
SLeRIMN. ... vi. ia wnrc inn sai PO Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
Steam... candle 20 5% P.G.& E. Co. S. F. rate hearings, 1913-14. 
Stearn. lala a 20 Floy 3rd Ave. Case, N. Y. City. 
Steamy, sues ind 20 S.J. L.&P. Cor Cal. R. R. Com. rate hearing, 
Steam... ...... kh. Jive 15-25 Metcalf Trans. Am. Soc. C. E., 1909. 
steam, slow speed......... 20 Wis. R. R. Com Quoted by Henry Floy. 
Corliss slow speed. ........ 25-30 Foster ‘“ Eng. Valuation,” etc. 
steam high speed. ......... 15-20 Foster ‘“ Eng. Valuation, etc. 
steam, high speed......... 15 Wis. R. R. Com Quoted by Henry Floy. 
E88... i dese dane sn uRIO-TS Foster ** Eng. Valuation," etc. 
AS La da aed Toa 15 Wis. R. R. Com. Quoted by Henry Floy. 
steam turbines............ 20 Stone & Webs. Chi. Union Trac. Co. Case, 
steam turbines............ 20 Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
steam turbines............ 15 St. 1. P.S. C. Union Elec. L. & P. Co. Case, 
steam turbines........... 20 Wis. R. R. Com Quoted by Henry Floy. 
steam turbines........... 20 Hammond Jour. Inst. E. E., 1907. 
steam turbines........... 30 1¢lb. P.G. &E. Co. S. F. rate hearings, 1913-14. 
Exhausters 
gasplant. in uel! 25 1¢ Ib. Wis. R. R. Com Quoted by H. A. Foster. 
Fences 
Wooden. outs Lina iil 12 P. G. & E. Co. S. F. rate hearings, 1913-14. 
Wiremesh...............5. 12 P. G.&E. Co. S.F. rate hearings, 1913-14. 
railroad... ll nie ra 3 Gillette Gt. Nor. & N. P. Appraisal, 
ratlroad. ohn aa 15 Cal. R. R. Com Stockton Term. & East. Case. 
Filter beds 
water filters............... 15-20 - Bryan ‘* Appraisal of water works." 
water works............... 30-50 ! Foster *“ Eng. Valuation," etc. 
Flumes 
wooden... ia, dh da 30 Cal. R. R. Com. Cuyumaca Water Co. Case. 
ER ELS aE 25! S.J. L. & P. Cor, Cal. R. R. Com. rate hearing. 
concrete. vil dhe 50 S.J.L.&P. Cor. Cal.R.R. Com. rate hearing. 
Foundations Same as life] Trac. Val. Com. Chi. Con. Trac. Co. Case. 
of article sup-; Floy 3rd Ave. Case, N. Y. City. 
ported } 
Fire protection apparatus. . . . . 12 | P. G. & E. Co. S. F. rate hearings, 1913-14. 
Fuel oil handling apparatus... . 25 Trac. Val. Com. Chicago Con. Trac. Co. 
Fire hydrants. ...... NE. 40 Williams Galena Appraisal, Kan., 1905. 
40-50 Metcalf Trans. Am. Soc. C. E., 1909. 
Furniture and fixtures. ... ..... 12% Cooley Milwaukee 3¢ Fare Case. 
20 Starrett Milwaukee 3¢ Fare Case. 
20 Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
20 Wis. R. R. Com Milwaukee 3¢ Fare Case. 
Gates and valves 
waterworks. ........0.0 40 Williams Galena Appraisal, Kan., 190s. 
water works............... 40-50 Metcalf Trans. Am. Soc. C. E., 1909. 
Gas Rolders...... 5.00 50 Wis. R. R. Com. Quoted by H. A. Foster. 
Governors 
gas plant... i). uu 0) 50 Wis. R. R. Com. Quoted by H. A. Foster. 
CONSUMETS. +vusuiuvenrsaas! 23 Wis. R. R. Com. Quoted by H. A. Foster. 
ABLES¢ 12