machine is in every sense practical and reliable, 

 readily understood and easily managed. After a 

 short experience with one of our hatchers, we will 

 guarantee that you may be absent from the machine 

 from seven in the morning till seven in the evening 

 and it will take care of itself, unless (Jia /) an un- 

 usual and extreme change of temperature takes 

 place. A change of from seven to ten degrees will 

 have no material effect on our incubator." {If no 

 extreme change of temperature takes place / Well, 

 extreme changes do take place in twelve hours, even 

 in daytime, but what about leaving it alone all 

 night, when changes of from ten to forty degrees 

 frequently occur f In some parts of this country 

 a change of fifty degrees within 24. hours is not 

 unusual?) 



SECOND ACT (from Catalogue No. 6, early edi- 

 tion.) 



" OUR REGULATOR." For ten years the 



Incubator has been manufactured. Each year it 

 has rapidly advanced in popularity and to-day 

 stands in the front rank with the best. This has 

 been accomplished by adding new features but 

 only when such features are proven practical and 

 consistent with other important appliances which 

 must be used to constitute a first- class hatcher, as 

 an imperfect regulator will derange and seriously 

 affect both moisture and ventilation. In equipping 



our with regulator, we have been very 



careful to avoid all puzzling contrivances. (After 

 105 



