POULTRY FOR PROFIT 55 
dom from drafts, a warm floor, and plenty of 
sunshine. 
One of the most common faults with most 
poultry houses is the matter of ventilation. 
When poultry raising was first looked upon as 
a promising business, many men erected houses 
y containing a large proportion of glass. It was 
though that the sunshine was the only neces¬ 
sary feature for the birds, under Winter condi¬ 
tions, and they made their chicken houses 
veritable hot houses. But the results were not 
as had been anticipated. It was found that 
• 
while the houses were fairly warm ih the day 
time, they cooled off considerable at night, and 
poor results were obtained from this wide range 
between the day temperature and the night 
temperature. Then another step was taken by 
these pi.oneers. They decided to heat their 
houses artificially. But even this system did 
not bring forth the big yield of eggs that had. 
been hoped • for. In all this expensive pro¬ 
cedure, a very important element had Peen 
overlooked, and that was the matter of fresh 
air. 
About twenty years ago, there was devised 
a poultry house that was a radical departure 
