54 
Transactions Texas Academy of Science. — 1907. 
The summaries, however, reflect with a fair degree of accuracy the aver- 
age cost of train service, and show the variation in cost for the several 
years of the seven-year periods ending June 30, 1907, and also show 
the increase in train and car loading and performance. 
The tables below give the summaries of this cost and statistical data, 
for each of the ten railroads, compiled from the annual and monthly 
statements submitted by them to the Commission. These roads lie en- 
tirely within the State of Texas, and in 1901 aggregated 6411 miles, or 
about 63 per cent of its mileage. In 1907 they aggregated 7623 miles, or 
about 61 per cent of the railroad mileage of the State. They are rep- 
resentative railroads, including both long and short lines — those with 
light and those with heavy traffic — and those varying as to maximum 
grades, curvature, physical condition and equipment. The ten rail- 
roads considered are the following, viz. : 
Mileage, Mileage. 
June 30, 1901. June 30, 1907. 
Fort Worth and Rio Grande Railway 146.16 195.88 
Galveston; Harrisburg and San Antonio Railway 917.00 1336.37 
Houston and Texas Central Railroad 507.75 789.01 
Houston East and West Texas Railway 191.00 190.94 
International and Great Northern Railroad.... 837.40 1106.00 
Missouri, Kansas and Texas Railway of Texas. . 1069.92 1121.72 
St. Louis Southwestern Railway of Texas 640.30 679.68 
San Antonio and Aransas Pass Railway 687.40 723.80 
Texas and New Orleans Railroad. 373.95 441.06 
Texas and Pacific Railway 1040.31 1038.16 
Total 6411.19 7622.62 
Under the several heads of cost are contained all of the expenses 
directly incident to the operation and maintenance of the trains of each 
class of service, passenger and freight. No roadw r ay or other general ex- 
penses are included. They are such expenses as, under a proper system 
of keeping accounts, can be charged directly to, or divided with a fair 
degree of accuracy between, the passenger and the freight service, and 
give the actual and relative costs of each. The variation in the costs 
of service for the different railroads, per train-mile, per car-mile, per 
passenger-mile and per ton-mile, indicates to a considerable degree, the 
effects of density and kind of traffic, roadbed characteristics, quality of 
motive power and equipment, proximity to fuel supply, and other con- 
ditions which affect the relative expense of operating and maintaining 
train service. 
Tables Nos. 1 and 2 give the average cost, charging the expenses 
under twelve general heads, of the passenger and freight train services 
