FERTILITY AND HATCHING OF EGGS. I59 



Buffoii. 1772. 



Histoire naturelle cles oiseaux. 

 Paris. \'ol. III. 



"Le coq," pp. 88-186. PI. II. Has much interesting 

 discussion regarding fertility, fecundity and incubation. 

 Many references to medieval and classical literature regard- 

 ing poultry. 



Curtice, C. 1903. 



Poultry Experiments. 



R. I. Expt. Kept, for 1902. pp. 333-373. 



Data on fertility and hatching of eggs in dififerent sea- 

 sons of year. No very definite conclusions. 



Dryden, J. 1897. 



Poultry Experiments. 



Utah Agric. Expt. Stat. Bulletin 51, pp. 1-33. 



Gives some data regarding the influence of the following 

 factors on "fertility:"" (a) season, (b) age of breeding 

 stock (females), (c) exercise, (d) length of time eggs have 

 been kept. No statement as to whether embryoes <lying 

 early were distinguished from trulv infertile eggs. Results 

 not conclusive. 



. 1907. 



Poultry Experiments. 



Utah Agric. Expt. Stat. Bulletin 102, pp. 203-237. 



Gives data on the etlect of housing on the fertility of 



eggs. 

 Fere, Ch. 1901. 



Reponses a quelques questions du questioimaire concernant 



les oeufs et Tincubation chez les oiseaux domestiques. 



Ornis, Vol. 11, pp. 425-426. 

 Gilbert,. A. G. 1901. 



Report of the Poultry Manager. 



Canada Expt. Farms Rept. 1900, pp. 251-277. 



Conclusion is reached, but not supported by numerical 



data, that winter laying and C(^nfinenicnt adversely affect 



the hatching (|uality of eggs. 



