22 maine: agricultural experiment station. 1902. 



DATES ON WHICH EGGS WERE LAID. 



BE 



iZ O 





SJ 













CI 



CO 



CO 





>> 



>> 



l>» 



>> 





ss 



03 



03 



* 



3 

 Irs 



8 



2 



2 



2 



741... 

 742... 

 743... 

 744... 

 745. : 

 747... 

 748... 

 749... 

 753... 

 754... 

 756... 

 760... 

 762... 

 763... 

 764... 

 765... 

 766... 

 768... 

 770... 

 772... 

 774... 

 776... 

 777... 

 778... 

 779... 

 780.. 



Inf 

 12.. 



R. Inf. 



N. C'k. 



R. 12... 



N. Inf. 



C'k. 

 Inf. 

 Inf. 

 Inf. 

 C'k. 

 Inf. 

 C'k. 

 Inf. 

 C'k. 



N. Inf. 

 R. 20... 

 N. C'k. 



N. 12... 

 R. Inf. 



N. 20... 



N. C'k. 



R. 12... 

 R. 20... 

 R. 12... 



C'k. 

 Inf. 



N. 20 . . 



R. Inf. 



N. C'k. 



R. Inf. 



N. 12... 



R. 12... 



N. Inf. 



20... 

 C'k. 

 C'k. 



R. C'k. 

 N. C'k. 



N. Inf. 



12... 

 Inf. 



<;'k. 

 20... 



12... 

 C'k. 

 Inf. 

 C'k. 

 12... 

 12... 

 C'k. 

 C'k. 



'20'.'..' 

 Inf. 



N. Inf. 



N. Inf. 



N. C'k. 



N. C'k. 



R. Inf. 



R. Inf. 



R. 20... 



N. C'k. 



N. C'k. 



N. Inf. 



N. 12. 



C'k. 



N. C'k. 



20.... N. Inf. 

 Inf.. R. 12. 

 20., 



R. C'k 



N. 12 



M. Inf 



N.'Ta! 



r. 20 . 



R.' C'k 

 B. "inf 



R. 12 . 

 R. C'k 



N. 20 



N. C'k 

 R. 12 . 

 R. 20. 



R. 20 . 



N. C'k 



R. Inf 

 R. 12. 



N. 12. 

 N." 20. 

 R." 12 '. 



R. C'k 



N. 12. 



R. Inf 

 N. 12 . 

 R. 12. 



N. C'k 



N. 20 



N. Inf 

 N. C'k 



N. 12 

 R. 12 



12 



Inf 



12. 



12. 

 12. 



N. C'k 



R. C'k 

 R. C'k 



N. C'k 



R. 12. 



R. 12. 



R. 12. 



12 



R. Inf 



R. C'k 



R. 20 . 



R. Inf 



The letter R marks the eggs that rested and N indicates those that were not 

 rested. The other marks in the table are explained on page 19. 



SUMMARY OF RESULTS. 













<*> S 





be 



<6 



OJ3 



be 



bo £ 





bD 





bx 



bo -u 



be *j £ 





V 





a> 



<o a 



cw c « . 











<H 0> >W-I fl 



■m »»sOa 





0"0 



Oo3 



o . 



O ^ gp O o 



j5u cc >>£ 



% H o <0 eS o3 



g.H O »3 «3 s3 



Treatment of eggs. 







u « 





S 03 



£<» 







■2-° 



•2 m 





>° a rr. ft-d P 



-2^" P^-TrO 





° 



sb .5 



s| 



s s 



Num 

 in w 

 deve 

 stop 

 12th 

 ineu 







65 

 63 



15 

 22 



17 



18 



20 

 17 



13 





20 



TIME REQUIRED TO ESTABLISH EERTILITY IN EGGS. 



The following experiment was undertaken to determine how 

 soon after mating eggs become sufficiently fertile to yield chicks. 

 For this purpose there were selected 20 Barred Plymouth Rock 

 hens one year old, that had been laying heavily during the five to 

 seven months preceding, but had not been in the company of male 

 birds since they were young chicks. Late on the evening of May 

 25 a cockerel 12 months old was placed in the pen with them and 



