138 Artificial Hatching of Chickens. [June, 



affected by the lamps. To this system of ventilation may be 

 attributed much of the success recorded below. The house is 

 placed in a sheltered position, under the shade of a large walnut 

 tree, with a view to modification of summer heat. 



Table I. — Comparative Temperatures in the Open Air and in 

 the Incubator Room. 







Outside. 



Incubator Room. 



Date. 









Morning 









Maximum 



Minimum 



Temp. 



humidity of 



Afternoon 







Temp. 



Temp. 



Atmosphere (*). 



Temp. 



1903 





0 F. 



0 F. 



Q F. 





0 F. 



March 12 



51 



27 



58 



66 



59 



53 



20 



s6 



41 



61 



74 



64 





28 



60 



39 \ 



62 



64 



62 



April 



3 



50 



29 



62 



62 



68 





4 



55 



47 



62 



73 



67 



3 3 



16 



47 



25* 



59 



56 



61 



33 



23 



43 



28 



59 



60 



58 





30 



60 



46 



63 



66 



68 



May 



8 



62 



35 



64 



62 



64 



33 



15 



62 



45 



66 



59 



68 



33 



^9 



63 



32 



66 



64 



69 



33 



28 



70 



54 



68 



74 



7i 



June 



3 



82 



40 



58 



57 



62 





13 



57 



39 



69 



68 



61 





24 



72 



53 



70 



56 



74 



July 



2 



89' 



46 



66 



68 



78 



14 



65 



42 



66 



64 



6 9 h 



'3 



25 



77 



43 



66 



72 



69 



Aug. 



10 



70 



54 



67 



68 



69 



>3 



25 



56 



52 



62 



.72 



66 



I904. 













Jan. 



13 



5i 



44 



5o 



94 



40 



3> 



17 



42 



27 



42 



93 



49 



3 3 



23 



42 



23 



42 



89 



49 





30 



46 



40 



5 1 



94 



52 



Feb. 



6 



48 



35 



55 



80 



54 





12 



42 



29 



52 



81 



52 



3' 



13 



49 



39 



54 



70 



56 





22 



53 



47 



55 



70 



59 



March 



4 



40 



26 



5i 



74 



48 



»3 



10 



57 



38 



49 



69 



52 



3 3 



17 



49 



26 



55 



93 



59 





24 



48 



36 



5o 



94 



54 





30 



53 



30 



52 



82 



5 6 



* In the room a wet and dry bulb thermometer is used, by which the temperature 

 of the room is recorded, together with the saturation point ; and the humidity is 

 calculated by a Negretti and Zambra moisture meter. 



It is interesting to note how far the extremes of outside 

 temperature affect the atmosphere within the incubator 



