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UNION SEED & FUEL CO., BOISE, IDAHO 
DEPENDABLE POULTRY SUPPLIES 
OIL AND ELECTRIC INCUBATORS 
THE FAMOUS PETALUMA 
160-egg, $31.75; 320-egg, $43.00; 640-egg, $65.00; 640-egg, Double Compartment, $75.00 
WHY YOU SHOULD USE PETALUMA ELECTRIC INCUBATORS 
The regulation of Petaluma Electrics is positive 
and accurate. The temperature never varies. 
Pure, warm fresh vitalized air surrounds the 
eggs at all times, making healthier and stronger 
chicks. 
They are the simplest machines in the world 
to run. There is only one adjustment. No lamps to 
fill, clean or trim. Labor reduced to the minimum. 
All the old drudgery is done away with by these 
wonderful machines. 
They can be attached to any ordinary electric 
light socket, can be run in any room in the house 
—no muss or odors. 
They are the finished product of nearly twenty- 
five years of careful experimenting and tests. You 
get the most wonderful hatches the poultry world 
has ever known. 
Many of the largest and best hatcheries in the 
world have adopted our machines also we have con¬ 
verted the machines they have been using, into elec¬ 
tric incubators, enabling them to hatch bigger, better 
and stronger chicks than they have ever been able 
to do previously. Early in the season of 1919-1920, 
they converted in a few weeks sufficient machines 
in the big hatcheries of Petaluma and elsewhere, to 
equal 1500 504-egg machines, and that good work has 
been going ever since. This would not have been 
possible, except that the hatcheryman recognized that 
nothing in the world equaled Petaluma Electrics. If 
these men of long years of experience in hatching 
are adopting ours it ought to be safe for you. No 
hatcheryman will spend several thousands dollars in 
making the change unless he is satisfied he is getting 
something superior to anything he has previously 
had. Illustrated circulars mailed upon request. 
Petaluma Hot Water Incubators 
Combine every feature of mechanical supremacy and enduring qualities and are in every respect 
just what is claimed, the best hot water incubators at the lowest price. 
The water is circulated in copper tubes of larger size than is usually put into incubators, therefore 
more ratdiating surface and hence better heating. The entire heating system being copper, there will 
be no rusting or accumulation of rust or scale in the pipes to obstruct the circulation of the water. 
ELECTRICALLY HEATED HOT WATER INCUBATORS 
Where one has the electric current service, it is better to use our regular electric incubators. One 
derives all the advantages of the character of warmth supplied through our electric system, which 
many operators claim has a very subtle and invigorating influence upon the development of the chicks. 
Should any one, however, desire to heat the water by electricity instead of coal oil, we can furnish 
an adapter heating element, to insert in the heater, and a thermostat and breaker and necessary 
connecting wire at a very liberal price. 
Lamp and Burner 
Our Petaluma lamp with sleeve burner is used, making it more economical in consumption of oil 
than any other machine. The tank style of fount is used on two larger size incubators, which carries 
enough oil for a week or more, thus lessening the labor in caring for the machines. 
Moisture Pan 
The moisture pan is placed in a most unique position. It is inserted through the front of the 
machine, is easily handled, and the operator can always see exactly the amount of water it contains 
and very readily put in more when it isneeded. 
Plus tax on all above. Freight prepaid ivhen cash accompanies order on all above. 
