fe;rtility and hatching of eggs. 157 



Annotated Bibliography of Literature Dealing with 

 Factors Influencing the Fertility and Hatching of 

 Eggs. 



In preparing this bibliography the extensive Hterature deal- 

 ing with incubation and \vith all of the factors which, acting 

 during incubation, influence the hatching of eggs has been 

 omitted as falling outside the limits of the ^Dresent discussion. 

 The attempt has been made here to include only original papers 

 of intrinsic importance (i. e., such as really contribute some- 

 thing to the subject). No effort has been made to include (a) 

 general discussions of fertility and hatching which do mot con- 

 tribute, new data or ideas, (b) textbooks and general treatises 

 on the embryology of the chick which incidentally discuss the 

 fertilization of the eggs ( the only exception here is the latest 

 and best of such works, viz., that by Lillie ), (c ) general treatises 

 on poultry husbandry or some of its phases, (d) classical or 

 medieval literature containing allusions to poultry. It is not 

 to be hoped that, even in the restricted field covered, the bibli- 

 ography is complete, but it is hoped that few contributions of 

 importance have been overlooked. It is published simply in the 

 belief that it will prove useful as a nucleus for a subsequent and 

 more complete bibliogra]:)hical resume of the subject treated. 

 Anon. 1894. 



Egg Fertility. 



Agrl. Student, Vol. I, No. i, pp. 6 and 7. 



Data on influence of duration of mating on fertility of eggs. 



. 1909. 



Experiments at Llangamarch Wells. 



Monthly Hints on I'oultry (London, Eng. ) \'ol. IV^, No. 



35, July. 1909. 



. 1909. 



Experiments at Llangamarch Wells Poultry Farm. 

 Monthly Hints on Poultry. \'ol. IV, No. 37, Sept., 1909. 



These two papers give detailed reports of some experi- 

 ments carried out by A. J. Odam to determine very pre- 

 cisely (in hours) the duration o\ the period elapsing 

 between mating and fertility. In one case a chick was pro- 

 duced from an esji"' laid 72 hours after matine-. 



