THE INCUBATOR-BROODER METHOD OF RAISING GROUSE 



477 



air movement. During the study the basic requirements for artificially incubating pheasant 

 and quail eggs were determined and those for grouse eggs were outlined as a result of 

 experiments with some 350 eggs. 



"still air" incubator with turning trays to hold incubating eggs and pedigree trays 

 into which the eggs are shifted before hatching 



Beginning in 1933, a series of tests covering incubators and incubator conditions were 

 also carried out at the Research Center where incubator techniques were set up, carefully 

 checked and modified as appeared desirable. Laboratory recommendations, resulting from the 

 Cornell experiments, were also tested on large numbers of grouse eggs under practical condi- 

 tions. Thus was secured the background for the recommendations detailed later. 



The studies carried out to date indicate that grouse eggs may be incubated and hatched 

 more successfully in properly constructed still-air incubators than in agitated-air machines. 

 No unusual situations or difficulties were encountered in securing successful hatches of eggs 

 in the former type. In general the operation of the machine is not materially different from 

 that employed with pheasants or quail. 



The conditions recommended in table 70 will serve as a guide for the operation of the 

 incubator. 



