27 



Table VII. A Comparison op Methods of Hatching. 



How Treated. 



Hens. 



Earth nests 



Straw " 



Ventilated nests 



Roomy " 



Crowded " 



All Hens 



Incubators. 



Buttermilk and zenoleum 



Whole milk and " 



Water, carbon dioxide and zenoleum 



Water and zenoleum 



Buttermilk 



Water and carbon dioxide 



Water only 



Lamp fumes dry 



Zenoleum dry 



Skim-milk 



Water, milk and zenoleum 



Lamp fumes, water and zenoleum . . . 



Whole milk 



Dry or no treatment 



0> 



CO 



60 

 60 

 03 



O 



23 



23 



23 



123 



176 

 299 



61 



110 



44 



464 



583 



129 



1,221 



112 



327 



330 



83 



61 



353 



1,406 



00 



60 



•-w Oi 



° 



o> S 



S3 — 



3^ 



CO 



T3 ■ 



CD 



= ■ 



O 



— 



o> 

 A 



o> H . 

 c *> 



§J O co 



Ph 



ss 



13.1 

 8.7 

 13.1 

 10.6 

 15.9 

 13.7 



8.2 

 17.3 

 13.6 

 16.1 

 18.3 

 20.1 

 13.9 

 24.1 

 13.1 

 13.6 

 12.0 

 21.3 

 15.3 

 16.3 



4.3 



8.7 



13:1 



7.3 

 4.0 

 5.4 



19.7 

 10.0 

 11.3 

 11.4 

 10.0 

 7.8 

 11.3 

 14.3 

 13.7 

 13.0 

 14.5 

 14.7 

 12.2 

 12.6 



T3 03 



CM £ 

 o> t> *• 



53 °^ 



60 



52.2 



60 



66.6 



50.0 



56.9 



49.1 



58.2 



52.2 



52.8 



52.0 



48.1 



51.9 



38.4 



47.4 



40.6 



32 



34 



48 



40 



14.3 



16.6 



35.7 



20 



12.5 



16.5 



43 



vp Ol 



« o\ CO 



03 r* CO 

 3D -5 60. 



M ~, 60' 



«jg » 



— ' 0) 05 



O) ^«4H 



>-t< o 



J3 

 o 



8.0 

 21 

 13.0 

 16.7 

 28.0 

 22.5 

 37. 

 16.3 

 32.2 

 26.1 

 15.3 

 '23.5 

 52.3 

 60.5 



52.2 

 43.5 

 39.1 

 52.8 

 43.7 

 47.5 



45.9 

 45.5 

 45.4 

 44.0 

 37.4 

 37.2 

 32.7 

 32.1 

 32.1 

 30.0 

 27.5 

 26.2 

 23.2 

 16.1 



CO 



o> 

 o 



— 



O 



2 



2 



2 



11 



16 



27 



1 

 2 

 1 

 6 

 8 

 2 



13 

 2 

 3 

 3 

 1 

 1 

 4 



12 



Matters in General. 



The egg's purchased from outside sources, which includes large 

 poultry farms and the ordinary farm flock, did not hatch chickens any 

 better than our own. When our chickens died when hatched in certain 

 incubators, the others died also. We received no eggs from any source 

 that were free or anywhere nearly free of the bowel trouble, etc. 



We have not included the eggs from outside source in our tables for 

 hatches, because we failed to get a division of any lot that was uniform 

 as to fertility, etc., and I believe that exact experimental work with in- 

 cubators can not be done unless the same hens' eggs are used in each 

 machine. 



Some tests were made of putting the eggs under hens for one week 

 and then removing them to an incubator to finish hatching. Eggs were 

 also started in incubators for one and two weeks, and then finished under 

 hens. We also took eggs from the machines on the nineteenth day; of 



