18 CIRCULAR 824, U. S. DEPT. OF AGRICULTURE | 
The time required to cover the 11.35-mile cross-country course 
ranged from 83 to 129 minutes and averaged 109. It was significantly 
associated with sires (table 2), years (table 4), length of stride at the 
walk and trot (table 5), action at the walk and trot (table 7), score for 
performance at walk (table 8), top line of back (table 12), and riders 
(table 18). The average time required by the offspring of different 
sires ranged from 100 to 121.5 minutes (table 2). For years, the time 
required ranged from 122.8 for 1941 to 99.9 for 1947 and showed a 
constant decrease except for 1942 (table 3). The riders had a signifi- 
cant effect on the time made on the cross-country ride. They changed 
over the years. Some were used but 1 year; one was used 6 years. 
Obviously, it is impossible to separate entirely the effects of sires, years, 
and riders on the time required to cover the course. However, the 
average differences between the time required by the offspring of the 
different sires within the same years and with the same riders were 
significant (table 4). 
TABLE 12.—Association of top line of back and slope of croup with time 
required to cover 11.35-mile course and analyses of variance 
AVERAGE PERFORMANCE 
| 
Average Average 
time re- time re- 
. | quired quired 
Score HOUND line | Horses | to cover S Coreeiey SORE of | Horses | to cover 
: 11.35- P 11.35- 
} mile mile 
| course | course 
| 
‘Number| Minutes | Number| Minutes 
A BABA As mad Re A vi Pits |e gatets se See See 2 122. 0 
Spas pee 2s NHI OOM at ee | FS ak pee el Bs Sg bc Ee ed a ee Oe a ee + 106. 2 
Goi Be BE nappa a Fog Ube OY: SAR a es hee ae re lhe Sot 15 109. 7 
nS AR oe Reg | B68 | gOS 63 = aOee te oe eee gee 21 109. 2 
RE GS Rite cot Me Ht 1 Ogi ees wh Meera eae 15| 103.1 
: (beasts Peau ile [be Sele 4 er 2 6| 108.5 
Total or average_| 63 | 108.0 | a 
| fee aes supe eee ro MEN CoS 63 108. 0 
ANALYSES OF VARIANCE 
| Degrees| Degrees 
Source of variance | of free-|_ Mean | Source of variance _ of free- Mean 
dom (Squares 3} dom | Sauares 
Between top line of | 4 | *207.6 | Between slope _ of | 5) 167. 2 
back. | croup. | 
Within top line of | 58 | 81.3 | Within’ slope _ of 57 82. 7 
back. | | croup. 
Rotals ales Sauer (ipa Weettes ted lis predityear(. Scarred aay | +862 eset 
| 
11—low, long —; 2=low, long; 3=low, long +; 4=medium —; 5=medium; 
6=medium +; 7=short, level — ; 8=short, level; 9=short, level +. 
2 See footnote 2 of table 10. 
3 *— Significant. 
