892 
Journal of Agricultural Research 
Vol. XXX, No. 9 
Growth and reproduction records—female 
I—Controls Received Untreated Milk 
Date 
Weight 
of dam 
Date of birth 
* 
Number 
of young 
Age of 
young 
in days 
Average 
weight 
of young 
Normal 
weight 
of young a 
Ratio of 
actual 
weight to 
normal 
weight 
Female A: 
Sept. 9_ 
155 
Aug. 16 _ 
5 
24 
34. 0 
23. 7 
1. 4 
Sept. 22_ 
134 
...Tdo_ 
5 
36 
52. 4 
36. 2 
1. 4 
Oct. 1 b _ 
_do... 
5 
45 
74. 2 
52. 5 
1. 4 
Female B: 
Oct. 29... 
253 
Sept. 9_ 
8 
50 
71.3 
59.4 
1.2 
Dec. 22_ 
228 
Nov. 27_ 
11 
25 
32. 7 
24. 7 
1. 3 
Jan.16_ 
272 
_do_ 
.. 11 
50 
90.7 
59.4 
1. 5 
Feb. 7_ 
242 
_do_ 
11 
72 
144. 0 
106. 2 
1. 4 
Feb. 27_ 
243 
Jan.16_ 
5 
42 
47.0 
46. 1 
1.0 
II —Chlorine Water 
1 part active chlorine 
to 3,000 parts milk: 
Sept. 22_ 
190 
Sept. 5_ 
6 
17 
25.8 
17.7 
1.5 
Oct. 9.... 
215 
_do__ 
6 
34 
53. 3 
34. 9 
1. 5 
Nov. 29_ 
207 
Oct. 30 
6 
30 
41. 3 
30.1 
1. 4 
Jan. 25_ 
1 part active chlorine 
185 
Dec. 24_ 
8 
32 
42.0 
32.4 
1.3 
to 5,000 parts milk: 
Sept. 22__ 
149 
Sept. 4_ 
8 
IS 
18.4 
18.4 
1.0 
Nov. 29_ 
203 
Oct. 24_ 
6 
36 
57. 0 
37. 6 
1. 5 
Jan.19_ 
186 
Dec. 17_ 
8 
33 
45. 6 
33. 6 
1. 3 
Mar. 2_ 
193 
Feb. 13 _ 
6 
34 
39. 6 
34. 9 
1 l 
Apr. 29_ 
202 
Apr. 3_ 
6 
26 
30.8 
25. 7 
1.2 
III— Sodium Hypochlorite 
1 part active chlorine 
to 5,000 parts milk: 
Sept. 9_ 
Sept. 22_ 
Oct. 1_ 
Oct. 28_ 
Nov. 15... 
Dec. 23_ 
1 part active chlorine 
to 7,000 parts milk: 
Sept. 9_ 
Sept. 22_ 
Nov. 15... 
Jan.7_ 
Feb. 27__ 
193 
Aug. 20.. 
5 
20 
26.8 
20.1 
1.3 
191 
_do... 
5 
33 
46.2 
33.6 
1.4 
199 
_do_ 
5 
42 
66.8 
46.2 
1.4 
194 
Oct. 6... 
9 
22 
24.4 
21.8 
1. 1 
234 
_do_ 
9 
40 
55.9 
43.1 
1.3 
217 
Nov. 30_ 
5 
23 
40.6 
22. 7 
1.8 
170 
Aug. 15_ 
10 
25 
29.4 
24.7 
1.2 
184 
_do_ 
10 
38 
49.4 
40.3 
1.3 
212 
Oct. 17_ 
10 
28 
47.8 
27.8 
1.7 
253 
Dec. 7__ 
9 
31 
42.6 
31.2 
1.4 
279 
Jan. 29_j 
9 
29 
38.2 
28.9 
1.3 
IV.— Calcium Hypochlorite 
1 part active chlorine 
to 3,000 parts milk: 
Sept. 8 .... 
Sept. 22_ 
Oct. 25_ 
Nov. 25_ 
Dec. 22_ 
1 part active chlorine 
to 7,000 parts milk: 
Sept. 8_ 
Sept. 22_ 
Oct. 25_ 
Nov. 4_ 
Nov. 29_ 
Dec. 22_ 
Feb. 5.. 
192 
June 25_ 
1 4 
75 
137.2 
113.8 
1.2 
240 
Aug. 20_ 
4 
33 
56.0 
33.6 
1. 7 
195 
Sept. 23_ 
8 
32 
49.2 
32.4 
1. 5 
224 
Nov. 19_ 
6 
10 
19.5 
13.3 
1.5 
212 
_do_ 
6 
33 
64.6 
33.6 
1.9 
188 , 
Aug. 7- 
8 
32 
41.1 
32.4 
1.3 
202 
_do_ 
8 
46 
64.4 
52.5 
1. 2 
247 
Oct. 11_ 
5 
14 
26. 5 
15.7 
1.7 
247 
_do_ 
5 
24 
51.0 
23.7 
2.1 
246 
Nov. 9__ 
8 
20 
30.5 
20.1 
1.5 
255 
-do.... 
8 
43 
80.1 
47.7 
1. 7 
234 
Jan.10_ 
8 
26 
37.4 
25. 7 
1.5 
a The figures given in this column represent the average combined weight of male and female rats at a 
given age in days, according to Donaldson’s original tables. It is now recognized that these values repre¬ 
sent moderate curves of growth. 
b Ill, removed. 
O 
