TABLES 
TABLE 30. THE PROBABLE USEFUL LIFE OF VARIOUS 
ARTICLES (Continued) 
Description. Expo: Residual Authority. Remarks. 
Years 
Systems and plants (con.) 
electric railway............ 19.8 Wis. R. R. Com Duluth St. Ry. Co. Case. 
telephone.............v. «x. 10-25 Wis. R. R. Com. Oregon Telephone Co. Case. 
telephone..................| 14-15 Wis. R. R. Com Various cases in 1912-13. 
water supply.............. 50-65 Wis. R. R. Com Various cases in 1910-11. 
overhead system.........., 33% 35% Cal. R. R. Com Calis. E.C.s. NapaVal.E.C. 
st. ry. distrib. system.... | 12} Cooley Milwaukee 3¢ Fare Case. 
14 Starrett Milwaukee 3¢ Fare Case. 
st. ry. distrib. & trans. sys. 30.03 Wis. R. R. Com Milwaukee 3¢ Fare Case. 
Tanks 
wooden... .... AL nae 12 P. G. & E. Co. S. F. rate hearings, 1913-14. 
Steel... ......... 0 30 P.G.&E. Co. S. F. rate hearings, 1913-14. 
Tar extractors 
P.& A. 0Gn1 GEE do Wis. R. R. Com. Quoted by H. A. Foster. 
Telephone equipment 
Street railway............. 10-12 Wis. R. R. Com. Milwaukee 3¢ Fare Case. 
Street railway............... 13.3 Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
electric power plants.......| 12 P.G.& E. Co. S. F. rate hearings, 1913-74. 
elec. power plant lines. .... 20 S.J. L.&P. Cor Cal. R. R. Com. rate hearing. 
elec. power plant instrum’ts 20 S.J. L.&P. Cor Cal. R. R. Com. rate hearing. 
elec. power plant equipm’t. 8-14 S.J. L.&P. Cor. Cal. R. R. Com. rate hearing. 
farmersline. ....... i os. 15 Wis. R. R. Com Wautoma & Mt. Morris Tel, 
Line. 
subscribers instruments. . 8-10 10% Tel. * Data” Quoted by H. A. Foster. 
10 5% Chi. Tel. Com. Chicago Tel. Commission. 
10 5% Wis. R. R. Com Wisconsin Tel. Co. Case. 
telephone drop wires...... 8 15% Chi. Tel. Com. Chicago Tel. Commission. 
Testing instruments 
gleetrici. i. dol tol 10 20% Cal. R. R. Com Calis. E. C. vs. Napa Val. 
E. Co. 
Tools and shop machinery.... 5-25 Wis. R. R. Com Milwaukee 3¢ Fare Case. 
12% Cooley Milwaukee 5¢ Fare Case. 
14.2 Starrett Milwaukee 3¢ Fare Case. 
13.3 Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
20 Chi. U. T. Co. Chi. Union Trac. Co. Case. 
20 Stone & Webs. Chi. Union Trac. Co. Case 
tools, teams and furniture 4 10% Chi. Tel. Com. Chicago Telephone Com. 
tools and furniture........ 7 Wis. R. R. Com Quoted by H. A. Foster. 
tools and sundries......... 10 5% Preece Report Bristol Corp., 1906. 
Track 
rails, ties and bonding...... 12} Wis. R. R. Com Milwaukee 3¢ Fare Case. 
rails, ties and bonding..... 12} Cooley Milwaukee 3¢ Fare Case. 
rails, ties and bonding. ... 12} Starrett Milwaukee 3¢ Fare Case. 
rails, ties and bonding. ... 12.85 Chi. U. T. Co. Chi. Union Trac. Co. Case. 
rails, ties and bonding..... 13.86 Stone & Webs. Chi. Union Trac. Co. Case. 
rails, ties and bonding..... 13.33 Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
Straight... il 18 Wis. R. R. Com Quoted by Henry Floy. 
special work..............0 8.3" Mil. E. R. & L. Milwaukee 3¢ Fare Case. 
Special work............... 10 Arnold 4 Chicago Appraisals. 
special work.............../BY2 Wis. R. R. Com. Quoted by Henry Floy. 
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