Dec. 10, 1917 
Nature and Rate of Growth in Lambs 
611 
Table I .—Measurements and weights of 62 sheep when 14 and when 280 days old 
Item. 
1 
2 
3 
4 
s 
6 
7 
H X R 
and 
Sn X R 
crosses. 
Pure 
R. 
Aver¬ 
age 
at 14 
days. 
Aver¬ 
age 
at 280 
days. 
En¬ 
larged 
scale 
height. 
En¬ 
larged 
scale 
length. 
In¬ 
crease. 
Percent, 
Number of animals. 
56 
6 
62 
40 
40 
40 
( a ) 
App .. 
.... days.. 
14 
14 
14 
280 
14 
14 
Weight. 
. .pounds.. 
*T 
ic. c 
T 
14 
IK. 2 
68.7 
Height, shoulder. 
3 »s 
405 
v> 
39 ° 
575 
575 
640 
47-5 
Head length. 
... .mm. . 
no 
120 
US 
i 75 
170 
185 
52.2 
Head width.. 
.mm,. 
80 
80 
80 
115 
120 
130 
43-8 
Neck length. 
.... mm,. 
175 
170 
175 
285 
260 
280 
62. 9 
Trunk length. 
.mm.. 
320 
330 
320 
5 2 5 
470 
520 
64. 1 
Chest depth. 
.mm.. 
*45 
135 
140 
260 
205 
230 
85-7 
Chest width. 
.mm.. 
100 
95 
100 
170 
150 
1^5 
70. 0 
Loin width. 
.mm,. 
75 
60 
70 
120 
105 
US 
7 1 * 4 
Croup length. 
85 
75 
80 
135 
120 
130 
68.8 
Foreleg length. 
265 
280 
270 
395 
400 
440 
46.3 
Hindleg length . 
.mm.. 
300 
3 i 5 
305 
445 
450 
500 
45-9 
Ratios: 
Head width 
0.657 
0. 70 
Head length 
Foreleg length 
•753 
. 846 
Trunk length 
Chest width 
.654 
.717 
Chest depth 
Chest width 
• 324 
• 3 i 7 
Trunk length 
Loin width 
. 229 
. 221 
Trunk length 
Croup length 
•257 
.250 
Trunk length 
Chest depth 
•495 
.442 
Trunk length 
Hind leg length 
.404 
. 962 
Trunk length 
a Column 7 shows the percentage of increase from 14 to 280 days. It is therefore equal to (column 4 — 
column 3) column 3. 
Columns 5 and 6 of Table I show the average conformation of all 
lambs measured at exactly 14 days of age 1 and again at an average of 
280 days. Owing to losses and sales, the number represented in the 
older lot is smaller than it was at the beginning. 
A comparison of these figures shows the proportions relative to height 
that exist in conformation at these respective stages of growth. These 
may be summarized as follows: In developing from 14 to 280 days 
(comparing columns 5 and 4). 
1. The head becomes relatively longer and narrower. 
2. The neck becomes relatively longer. 
3. The trunk becomes relatively longer. 
1 Measured at 14 days magnified to scale of height at 280 days, column 5, and to scale of length at 280 days 
column 6. 
