FERTIUTY AND HATCHING OF EGGS. 



123 



TABLE VII. 



Percentage of Infertile Eggs Produced by Each of the Barred 

 Plymouth Rock Pullets Making Complete Records in the 

 Hatching Season of ipo8. Arranged According to Pens and 

 Cockerels. 



Band number and per cent, of infertile eggs for each pullet. 

 (Band numbers are in brackets; percentages unbracketed.) 







^ 'u fl o o 



(19)24, (21)14, (358)32, (357)36, (393)9. (712)20 



(10)36, (27)8, (112)18, (160)42, (402)30, (705)34 



(29)29, (87)17, (352)14, (353)17, (717)19 



(61)21, (122)15, (357)14. (374)22, (381)4, (406)24 



(12)19, (18)48, (38)9, (172)27, (366)13, (367)21, (414)7 



(39)26, (66)12, (415)50, (438)45, (707)0 



(20)73, (118)12, (197)12, (407)18, (726)20 



(23)28, (428)20, (709)20, (730)31, (737)13 



(368)15, (431)10, (734)4 



(121)41, (152)11, (185)15, (224)11, (432)37, (731)23 



(52)53, (99)33, (168)5, (719)40, (736)14 



(129)48, (223)38, (382)8, (725)6, (728)12, (732)14 



(359)15, (389)29, (395)24, (743)82, (744)24 



(377)16, (401)16, (405)32, (410)3, (411)14, (774)14, (784)47. 



(419)14, (422)15, (424)45, (745)41, (746)15 



(388)50, (397)6, (434)17, (441)33, (442)38, (749)4, (750)16 

 (762)6, (753)46, (757)10, (768)20, (770)10, (771)13 



(400)16, (408)16, (409)4, (443)6, (444)8, (447)5, (450)4.(758)19. 

 (759)12, (761)8, (762)10, (763)5, (764)13, (765)3, (766)5. 



22.5 

 28.0 

 19.2 

 16.7 

 20.6 

 26.6 

 27.0 

 22.4 

 9.7 

 23.0 

 29.0 

 21.0 

 34.8 

 20.3 

 26.0 



20.8 



8.9 



(2) The band number of each of the pullets placed in that pen. 



(3) The percentage of infertile eggs produced by each of these 

 pullets. (4) In the last column of the table are given the aver- 

 age percentages of infertile eggs produced by all the hens run- 

 ning in each pen. These averages in the last column are, in 

 other words, the only measures which it is possible to get of 

 the relative ability of the individual cockerels in fertilizing eggs. 

 They are pen or cockerel averages. 



