24 BULLETIN 252, U. S. DEPARTMENT OF AGRICULTURE. 



Table XX. — Length of incubation of second brood of eggs, Winthrop, Me., 1911 



No. of 

 obser- 

 vation. 



Number 

 of eggs. 



Date — 



Appearance of — 



Incu- 

 bation 

 period. 



Num- 

 ber 

 dead. 



Depos- 

 ited. 



Red 



ring. 



Black 

 spot. 



Hatched. 



Red 

 ring. 



Black 

 spot. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 

 54 

 • 55 

 56 

 57 

 58 

 59 



10 



28 



10 



15 



48 



17 



31 



10 



7 



2 



5 



86 



3 



26 



• 8 



1 



3 



16 



16 



42 



36 



9 



Aug. 15 



Aug. 16 



do 



Aug. 16 

 Aug. 17 



Aug. 21 

 Aug. 22 



Aug. 23 

 Aug. 24 

 Aug. 25 



...do 



Aug. 26 

 Aug. 27 

 Aug. 28 

 Aug. 29 



...do 



Aug. 30 

 Sept. 1 



...do 



Sept. 2 



...do 



Sept. 3 

 Sept. 2 

 Sept. 3 



...do 



...do 



Sept. 4 



' Sept! "5 



Days. 

 1 

 1 



Days. 

 6 

 6 



Days. 

 8 

 8 

 9 

 8 

 9 

 9 



10 

 11 

 10 

 11 

 10 

 9 



10 

 9 

 10 

 8 

 9 

 8 

 7 

 8 

 7 

 8 



2 



14 



2 

 1 



5 

 1 



Aug. 17 

 do.. . 



Aug. 19 



Aug. 24 



2 



7 



Aug. 18 1 Aug. 20 

 do 



Aug. 25 



2 



7 



do 









Aug. 19 

 do 



Aug. 22 



Aug. 26 



3 



7 



Aug. 22 



Aug. 23 



do . 



Aug. 25 



Aug. 30 

 ...do 



3 

 2 



8 

 7 



Aug. 24 

 do.... 



Aug. 27 



Sept. 1 



3 



8 



Aug. 25 

 do 



Aug. 28 



Sept. 1 



3 



7 



Aug. 26 



Aug. 27 



.do 



Aug. 29 

 Aug. 31 



Sept. i 

 Sept. 2 



3 

 4 



6 

 6 



Aug. 28 

 do 



Aug. 31 



Sept. 3 



3 



6 













5 



28 



4 



61 



9 



22 



30 



15 



12 



31 



15 



11 



109 



16 



1 



4 



24 



2 



48 



16 



5 



6 



2 



27 



3 



32 



7 



8 



2 



4 



1 



8 



4 



4 



2 



6 



Aug. 30 

 .do 



Sept. 2 



Sept. 4 



Sept. 6 

 Sept. 7 

 Sept. 8 



...do 

 Sept. 9 

 Sept. 10 



...do 



Sept. 11 

 Sept. 12 

 Sept. 14 

 Sept. 15 

 Sept. 16 

 Sept. 18 

 Sept. 19 

 Sept. 20 

 Sept. 21 



...do 



Sept. 22 



...do 

 Sept. 23 

 Sept. 24 



...do 



Sept. 26 

 Sept. 27 

 Sept. 29 

 Sept. 30 

 Oct. 2 

 Oct. 3 



...do 



Oct. 4 



...do 



Oct. 8 

 Oct. 9 

 Oct. 10 

 Oct. 15 



3 



5 



7 

 8 

 9 

 8 

 9 

 10 

 9 



10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 17 

 18 

 17 

 18 

 19 

 18 

 19 

 19 

 20 

 21 

 22 

 22 

 23 

 21 

 22 

 19 

 16 

 17 

 18 

 20 



1 

 5 

 2 



3 

 5 



...do 











Aug. 31 

 .do 



Sept. 3 



Sept. 6 



3 



6 



...do 











Sept. 1 

 ...do 



Sept. 3 



Sept. 8 



2 



7- 



...do 











Sept. 2 

 ...do 



Sept. 4 



Sept. 10 



2 



8 



...do 











Sept. 3 



Sept. 6 



Sept. 15 



3 



12 



...do 











...do 











Sept. 4 

 ...do 



Sept. 7 



Sept. 17 



3 



13 



Sept. 5 



Sept. 8 



Sept. 18 



3 



13 



...do 









Sept. 6 

 ...do 



Sept. 10 



Sept. 22 



4 

 5 



16 

 16 



Sept. 7 



Sept. 12 



Sept. 23 



Sept. 8 

 ...do 



Sept. 13 



Sept. 26 



5 



18 



Sept. 10 



Sept. 17 



Sept. 28 



7 



18 



Sept. 12 

 ...do 



Sept. 18 



Sept. 29 



6 17 



Sept. 15 

 Sept. 22 

 ...do 



Sept. 20 

 Sept. 26 



Seot. 30 

 Oct. 6 



5 1 15 

 4 I 14 



...do 1 



1 



Sept. 25 I Oct. 1 I Oct. 10 



6 i5 



A 



verage 



2.884 ' 9.069 

 7 1 18 

 1 I B 



11.862 

 23 



7 



41 



y 



[aximum 



IV 



[inimum. .. 











