INCUBATION AND BROODING 35 
it out first to see if it runs properly and maintains a stable 
heat. First see that it sets level. Now the lamp is to 
be cleaned and filled with a good grade of kerosene to get 
a steady flame and no smoke. The lamp should be 
lighted and placed in position, as several hours will be 
required to dry and warm the woodwork thoroughly. 
When the thermometer registers 100 degrees, it will be 
necessary to examine the machine every 15 or 20 minutes 
in order to adjust the thumb screw in the regulator. 
When the thermome- 
ter registers 102 de- 
grees adjust the thumb 
screw so the tin disk 
on the regulator arm 
will be just trembling 
on the rise. The ma- 
chine should be run at | 
least 24 hours before | 5 
putting the eggs in. TURNING THE Eccs 
After the eggs are 
added the temperature will fall for a time until they have 
been warmed up to the rest of the internal parts. 
7. Turning the eggs.—Punctuality more than science 
is required for cooling and turning the eggs. The turn- 
ing should be done regularly twice a day, from the third 
to the eighteenth day, after which the eggs should not 
be turned. The cooling of the eggs requires practice. 
At first it is done simultaneously with the turning, 
but as the hatch progresses the amount of cooling 
must be increased. After the seventh day, at one turn- 
ing each day, the eggs are removed from the machine 
until they become cool to the touch. The time re- 
quired for cooling will vary with the temperature of 
the room and the development of the embryos. The larger 
