16 CIRCULAR 824, U. S. DEPT. OF AGRICULTURE 
a fast walk and a long stride. Canfield had the best record, 69 percent 
of his progeny being in this group. Slope of shoulder and length of 
stride at the walk were not significantly associated although both 
were associated with length of time required to walk a mile. 
Horses with good action at the walk generally made better time than 
those with poor action, as shown in table 7. Most of the difference in 
speed was found between the 5 horses with a score of 2 (a small narrow 
foot) that averaged 12.9 minutes to walk a mile and 58 horses with 
scores of 3 to 8 that averaged 15.2 minutes. Horses given a good 
score by the rider for performance at the walk made on the average 
consistently faster time than those given poor scores for this character 
(table 8). 
The time required to trot a mile ranged from 3.8 to 7.3 minutes 
with an average of 5.3 minutes for the 68 horses. Sires (table 2), 
length of stride (table 5), general conformation (table 10), and years 
(table 18) were all significantly associated with time required. Analy- 
sis of variance showed that on the average there was not a significant 
difference, in time required, between offspring of different sires within 
the same years and with the same riders (table 4). In general, fastest 
average time at the trot was most closely associated with a medium 
score on general conformation, as shown in table 10. 
TaBLE 10.—Association of general conformation and slope of croup 
with time required to trot 1 mile and analyses of variance 
AVERAGE PERFORMANCE 
a | Average A Average 
core for general time to core for slope of time to 
conformation ! Horses trot 1 croup 2 Horses trot 1 
mile mile 
Number | Minutes Number | Minutes 
a SS aM 3 Geo Ru fe eae pe ees es 2 6. 3 
Ey eae Ee ne an we ene 7 Lita kg ints Beye canes eae A IR 4 Daal 
Oe ae eee tone 11 Ae Ogos Rata canes eailieeat e 15 Buel 
Y Ee Net aie 26 Liar: Belk =¥ 0 etdon ie meee els cs crc ct 21 5. 4 
Baa een ere alam 12 en Ny (eis toe De SEN eco eee ge 15 50 
On ae ii reer ahaa ni 4 GAZ S| Si ee See a ees 6 5. 6 
Total or average_ 63 Eyre | teeta a eae a ee 63 iy 
ANALYSES OF VARIANCE 
| we 
| Degrees| Degrees 
Source of variance | of free- |_ Mean 3| Source of variance | of free- sbene 
dom _ | Sauares dom | S@uares 
Between general con- 5 *1.09 | Between slope of 5 0. 93 
formation. croup. 
Within general con- 57 .41 | Within slope of 57 . 42 
formation. croup. 
Lotal=esacnatso. G2 sic) A | a ee ee 62452 38sens 
11—poor—, 2=poor, 3=poor+, 4=medium—, 5=medium, 6=medium-+, 
7=good—, 8=good, 9—good-. 
21=steep—, 2=steep, 3=steep+, 4=medium slope—, 5=medium slope, 
6=medium slope+, 7=level—, 8=level, 9=Ilevel+. 
3 *— Significant. 
