less than $25 to make it, as built then, and prob- 

 ably it did cost between $35 and $50. 



Now what do you think of the same machine 

 being "improved," and one of 150 egg capacity 

 with a brooder attached for the sum of $12.50? 

 Eight of the latter for the price of one of the 

 former ! If you can swallow the "improvement," 

 don't kick if it gives you a pain. 



The Thermostatic has been sold twice since Mr. 

 Renwick invented it. Show him one of the "im- 

 proved" Thermostatics (with a new name) and 

 ask him what he thinks of it. Ask him to point 

 out one of the good features of the old Thermo- 

 static in it. He is a mechanical engineer and ex- 

 pert, and if he were to put an incubator in the 

 field to-day, it would be a leader among high class 

 machines. 



The following picture represents the oldest hot- 

 water incubator now manufactured. The egg 

 chamber is heated by a hot- water tank. It has 

 double trays, one above the other. The ther- 

 mostat works a lamp trip to draw a sleeve over the 

 wick to reduce the flame and back again to 

 increase it. It also opens a valve from the egg 

 chamber to let off surplus heat. The clock is used 

 to turn the eggs. This machine is made of good 

 material and with good workmanship. It has a 

 nursery below. One holding 144 eggs, steel tank, 

 sells at $62.50; with copper tank, $68.50. Mr. 

 Campbell owns his factory and makes machines in 

 large numbers, therefore can and does sell them 

 as low as consistent with good material and work- 

 83 



