212 POULTRY PRODUCTION 



same in both cases, while the advantage in weight of the 

 moisture chicks was so slight as to be practically negligible. 

 It should also be noted that in the case of the moisture 

 chicks, evaporation was much restricted as compared with the 

 calculated normal loss. (Calculations from Table XXXI.) 



Tahle X.X!X[[. — Result of In'cub.\tino 



Number of eggs incubated 



Number of chicks hatched 



Total lo33 of weight in egija 44 49 poumlg 29.41 pounds 



Normal loss as calculated 



Departure from normal loss of weight 



Average w^eight of chicks per 100 



when removed from incubator 8 44 " 8.79 



A\'erage weight of chicks per 100 



at second weighing . 3.ii 70 " 36.20 



Total deaths from all causes . 415.00 402 00 



Per cent, died of all hatched . 20 00 20.60 



Lewis' found that under Massachusetts conditions in 

 a cellar showing an average relative humidity of 60 per cent, 

 increasing the moisture content of the air in the incubator 

 by means of sand trays increased the percentage hatch, 

 produced chicks which weighed more at hatcliing and were 

 more vigorous, and brought about a greater uniformity in 

 hatclhiig. rnfortimately neither the evaporation nor the 

 relative humidity were recorded. 



(Traham- re]H)rts that under Ontario conditions, of all eggs 

 set, 11.- ])cr cent more were hatched when moisture was 

 supplied than when it was not, and further that on an 

 average, for every one hundred eggs set there were 10. 1.) per 

 cent more chicks living at the age of four weeks that were 

 hatched in moisture machines than in the case of those 

 hatched in non-moisture machines. Here again there is 

 no indication of the per cent, of relative humidity. 



In Oregon' Drvden secured the results shown in Table 

 XXXIIl. 



' New .Jersey Experiment Station Report, 1911. 



- Ontario Bulletin No. 103. 3 Oregon Bulletin No. 100. 



