525 
and most efficient type of equipment. Further data are given in 
vhe section on Machinery and Railway Equipment (page 379 of Com- 
merce Yearbook). 
Table 16 shows installations and retirements of locomotives and 
freight cars since 1913, and the number and capacity of those in 
service at the end of each year. While the number of new cars 
annually installed has decreased since 1923 the average capacity and 
number in service has increased. Fewer locomotives were in service 
in 1925 than in immediately preceding years, but the average size 
has grown steadily, and the aggregate tractive effort in use is con- 
siderably greater than a few years ago. 
Table 16.—XLocomotive and Freight-Car Equipment of Class I Railways 
Locomotives 
Freight-train cars 
In service 
Year! 
ors 
er cr RW 
ERR Am mmm swam er 
fmmmeeac ees n———— 
wT TT 
Num- 
yer in- 
talled 
, 381 
245 
L114 
086 
148 
802 
of 
17 
od 
226 
360 
786 
733 
Num- 
Jer re- 
tired 
2,338 
1,862 
1, 507 
2,217 
1,423 
977 
~~ 
1, 254 
, 130 
682 
2, 746 
2, 529 
3. 005 
Num- 
ber 
31,172 
32, 533 
32,125 
31, 332 
11, 890 
a 889 
“gg 
746 
049 
54, 512 
35, 327 
35, 358 
a4 150 
Average 
tractive 
effort | 
pounds)? 
20, 956 
80, 705 
31, 840 
33, 188 
13, 032 
‘4,995 
5 789 
%, 365 
* 935 
1, 441 
39, 177 
39, 891 
40. 625 
Number 
installed 
162, 670 
50, 813 
86, 012 
26, 851 
17,210 
15, 249 
’8, 019 
36, 044 
3,406 
105, 394 
732, 060 
156, 672 
125 780 
Number 
retired 
06, 827 
96, 985 
90, 347 
06, 272 
62, 25¢ 
56, 02¢ 
£3, 27. 
75, 197 
69, 24; 
126, 471 
213, 78¢ 
118, 590 
117. 021 
Number in 
serviea 
1, 237,418 
> 291, 750 
286, 79% 
280, 955 
330,123 
354, 244 
389, 86( 
350, 707 
L344, 780 
>, 332, 286 
, 345, 591 
2, 379, 006 
3 280° (00 
Average 
capacity 
(tons) 
$38.3 
830.1 
40.0 
41.0 
{LF 
tL,’ 
‘LL 
2.0 
‘2, 
“3.7 
<3. 
4 
Years ended June 30 to 1915, inclusive, thereafter calendar years. 
Exclusive of electric locomotives. 
' Includes both Class I and Class II. 
Partially estimated from unofficial sources, 
Source: Interstate Commerce Commission. 
Condition of Equipment. 
The ratio of unserviceable to total number of freight cars for the 
year 1925 was 7.7 per cent and the corresponding ratio for freight 
and passenger locomotives 17.9 per cent. These ratios are lower 
oven than the low averages of 1924 and decidedly better than those 
in 1922. Because of high car surpluses it was natural that somewhat 
less effort was made than in 1923 and 1924 to cut down further the 
number of unserviceable cars. The figure for unserviceable locomo- 
tives closely approaches the 15 per cent set as a goal by the railway 
executives. 
During 1921 and 1922 the proportion of unserviceable equipment 
was extremely high, reaching 15.5 per cent for freight cars during one 
month in 1921 and 28.9 per cent for locomotives at one time in 1922, 
The great amount of motive power and equipment installed during 
the last few vears and the small percentage of locomotives and cars