POULTRY FOR PROFIT 25 
must not expect every egg that is placed in the 
incubator to produce a chick. A very good 
hatch is about 75 per cent. Of course, this 
varies considerably, ranging all the way from 
nothing to as high as sometimes 100 per cent. 
Usually one can reasonably expect as high as 
a 60 per cent hatch, at least, and very often 
it goes considerably higher, according to the 
conditions under which it is run. 
Moisture is a prime essential for the proper 
running of an incubator, and this should be 
provided for. If possible, arrange to run the 
incubator in a cellar, or some damp place. This 
can be aided, by springling water on the floor, 
etc. Care must be exercised in running the in¬ 
cubator that fire is guarded against, and some 
insurance companies make special provisions 
in their policies for such occasions, and make 
a slightly higher charge for their policies, be¬ 
cause of the danger. 
Another essential condition for a successful 
hatch with the incubator is proper ventilation. 
Most machines are provided with something 
for the admission of fresh air. It is also neces¬ 
sary that the room containing the incubator be 
aired frequently to admit fresh air, but not in 
