54 
TABLE 
eececcees 
eececes 
ete eee 
BULLETIN 1121, U. S. DEPARTMENT OF AGRICULTURE. 
22.—Number of 
Inbreeding and crossbreeding experiments. 
mature matings during successive 3-month periods, 1916-1919. 
| 
1916 1917 1918 1919 Vien 
| mat- 
| | ings 
1-3 | 4-6 | 7-9 |10-12) 1-3 | 4-6 | 7-9 |10-12) 1-3 | 4-6 | 7-9 /10-12) 1-3 4-6 | 7-9 /10-12| total. 
= | i an (ern eave | sce al | foc roe | Wea ee ld a 
29.0) 32.3] 33.0] 31.0! 29.0} 21.7] 22.3] 21.0) 22.7] 28.7] 31.0] 32.7] 37.3 39.0 34.0] 32.7| 119.4 
36.7| 33.7) 34.0] 31.3] 24.3] 16.0] 16.0) 14.0) 12.3] 13.7] 17.0] 18.0} 19.3) 23.7| 25.3] 27.7| 90.7 
23.3} 20.0] 19.0] 19.0] 17.0} 13.0} 12.0] 15.0) 17.0) 17.0] 11.7] 12.3] 13.7| 18.0) 19.0] 24.0| 67.8 
29.7| 24.7| 23.0) 22.3} 20.3] 18.7] 16.3] 20.7| 22.3] 21.0] 20.0] 22.3] 22.3) 29.7/ 31.0] 35.3! 94.9 
32.3] 25.3] 23.7] 21.0] 18.7] 16:7] 12.0} 8.7| 7.7| 7.3] 6.3] 5.0] 7.3] 10.0| 10.7/ 12.3) 56.3 
-|142. 0/123. 0,107.3 100. 7/101. 0} 76.3] 52.0) 31.3) 17.0] 12.3} 7.0) 4.7) 3.3......|.....|....- 194.5, 
293. 0/259. 01240. 0/225. 3/210. 3/162 3/130.7/110.7) 99. 0|100. 0} 93.0) 95. 0/103. 3 120.3/120.0132.0| 623.4 
3.0| 39.0! 51.3] 72.3) 82.3] 75.3] 68.3] 53.7) 49.0] 47.7| 38.3] 34.7] 31.0 24.3] 33.7] 28.7| 183.2 
Bee al us Be he 1.3] 2.7] 4.0| 5.0} 6.0) 6.7} 6.0] 8.0} 10.0] 16.7) 30.7) 32.0) 28.7| 39.4 
Hg fall hater olan Rape 0.3] 1.0} 3.0] 10.0] 10.0) 8.3] 11.3] 19.0] 22.3) 31.3] 39.3] 36.7; 48.2 
BA? a toe et <3) GaG) 41. Z| 22-3):36-7| 32.7) 33-0) 26-71 20. O).19:0/ 827] 2 a eee 54.3 
BUA les Le .3| 7.0} 14.0] 19.0] 26.0] 29.0 32.3] 28.0] 24.0] 24.7/ 13.3) 7.3! 4.3] .3] 57.4 
lhe heh aie Jacesslecinnn| 0B) 1.3). 4.7)" 601! 8.7)-"%. 71 10.01 49.7) 923107653] adea| tO) eee 
te SS. ol SE ea ee ee 2.7| 10.7| 12.7| 12.7] 12.7] 16.0 26.0) 22.01 19.7| 33.8 
ripen Bie i oe see ee --e--|---+-| 4.7] 18.3) 19.0} 16.0) 19.0] 28.3! 33.0) 29.3) 21.7) 47.4 
43.0| 44.7) 51 3 50.3) 48.7] 43.3] 41.0) 35.0] 39.0] 35.0) 34.0) 35.3] 39.7 35.0] 28.3! 34.7/ 159.6 
TABLE 23.—Number of litters born during successive 8-month periods, 1916-1919. In- 
breeding and crossbreeding experiments. 
1916 1917 1918 | 1919 
| Total. 
1-3 | 4-6 | 7-9 |10-12] 1-3 | 4-6 | 7-9 |10-12] 1-3 | 4-6 | 7-9 |10-12/ 1-3 | 4-6 | 7-9 {10-12 
30! 26] 33| 27| 23/ 25| 16| 22] 24| 22] 27 30 | 42 36 | 33 25 441 
25.1 96.) 31) 29 |° 461° Oh 14) a5)\¢ 9 heard) to 15:), 19)” 93 | oR) or 293 
20.1 16.| 28: | tea siets | AAS 28 pf Gs 12 Ral ae SA 14] TS oth mele 223. 
26.1. 20.) 20)),23.)o07. | @35a). 19.) Te) |i 19 eal) Baie tg!) or ioe ae 341 
22-1 $9. |, .16. BSAbatO.) e122 18.) USal4 FG Ieee OanReAeT 6) ee Geen 163. 
107. | 67.) 83: |: FRAGT 400 485) B42 FA if Gale Bi | lee PRBES nese 520 
230 | 174 | 201 | 176 | 139 | 120] 99] 102| 84] 71| 78 | 76 | 104/ 109/110] 108| 1,981 
fens 17| 43| 56| 67] 63] 76] 44| 36] 29| 25] 22] 24] 24) 31] 31 588. 
Sse call Sabsclenc oral ok Scat. 4.1) SU a Gal Ob 4-28: GRE Sz dal Gal mos, | aleons 164 
Rene San on ee Pak RC 16 3 b BS HS NetOa one 17 1). Ban sae | aa. ies 184 
1s ea ae? 1 TANELZ } MQ2K AT BOTS BS loeOS aE igen te O) ee eae 238. 
BESS WA HS Se £0113: | 5228), 28 | 285) |- 34 fener! Sree 255 14 9 12 aes 249 
Nea HA Sah RAR EG I Be SU 0G. if Ale, | 1D eat ROR ae TE) OU) Sita le 2A 15 
Bee (SAR Mt pO OF (3 feet bol SI ez igen on aah oe aD 138 
pare allem elt cae J-v---[-----| 9 | 21 | 20] 14) 21] 33) 36] 29 27 210 
43) 36| 46| 45) 44/ 40/ 42] 33/ 35/ 30 a1 [34 | 30] 33 | 28 29 588 
| | | | 
