30 BULLETIN 910, U. S. DEPARTMENT OF AGRICULTURE. 
Table XVIII. — Days per year trucks were out of commission when needed. 
Age of trucks (months). 
Total 
number 
of 
reports. 
Average 
days out 
of com- 
mission. 
12 and less 
187 
245 
147 
103 
0.7 
1.7 
2.0 
3.2 
13to24 
25 to 36 
37 and over 
All 
682 
1.7 
The total number of days the trucks of different ages were out of 
commission is as follows : 
Of the 187 which had been in use 12 months or less — 
157 were out of commission no days. 
23 were out of commission from 1 to 5 days. 
5 were out of commission from 6 to 10 days. 
2 were out of commission over 10 days. 
Of the 245 which had been in use 13 to 24 months — 
173 were out of commission no days. 
44 were out of commission 1 to 5 days. 
18 were out of commission 6 to 10 days. 
10 were out of commission over 10 days. 
Of the 147 which had been in use 25 to 36 months — 
93 were out of commission no days. 
39 were out of commission 1 to 5 days. 
10 were out of commission 6 to 10 days. 
5 were out of commission over 10 days. 
Of the 103 which had been in use 37 months or more — 
56 were out of commission no days. 
32 were out of commission 1 to 5 days. 
9 were out of commission 6 to 10 days. 
6 were out of commission over 10 days. 
Seventy-one per cent of the trucks had not been out of commission 
at all when needed, 20 per cent had been out of commission 5 days or 
less, 6 per cent had been out of commission from 6 to 10 days, and 3 
per cent had been out of commission over 10 days. In general, the 
newer trucks are more reliable than the older ones. While nearly 85 
per cent of the trucks which had been owned 12 months or less had 
not been out of commission when needed, only a little more than one- 
half of those which had been in use more than 3 years had not been 
out of commission during the preceding year. 
The average percentage of time lost on account of motor and tire 
trouble, breakage, etc., by 542 men owning trucks of different ages is 
shown in Table XIX. 
