13 



Notes on Table VI. — Machines in which Lamp Fumes and Carbon- 

 Dioxide were Used. 



The lamp fumes appear to do no harm from a vitality standpoint, but 

 rather increases vigor. 



Lamp fumes do not increase the hatch, but decrease it. I would like 

 to test lamp fumes on many makes of machines at all seasons of the year 

 before venturing- to say that they are beneficial. 



We had hoped to show better results from the use of carbon dioxide, 

 and I do not consider the result so far as being- at all final. We have not 

 yet. to my mind, secured the proper method of application. 



Thus far it appears to be a factor in vitality more than in decreasing 

 the fully formed chicks dead in the shell. 



The Model Incubator. 



The heaviest mortality was from chicks hatched from the eggs set in 

 March. The machine was run dry, and the evaporation was the largest 

 of the season. 



Washing the machine with a ten per cent, solution of zenoleum 

 appears to reduce the mortality or increase the vitality. The hatches 

 where the moisture was used are higher than where little or no moisture 

 was used. It is also evident that a large surface of water requires to be 

 exposed in order to check evaporation. 



With the hatch of June 24th, the evaporation was not as great as 

 early in the season, owing, I believe, to the interior of the machines being 

 practically saturated with moisture gathered from previous hatches when 

 moisture was used. 



Buttermilk used as moisture produces fairly good chickens. 



With this machine, as with others, some condition was present late in 

 the season that was absent early in the season, which increased the vigor 

 of the chicks. 



Cyphers Incubators. 



I have no suggestions or reasons to offer as to why the 1905 machine 

 gave much better results than the 1906 design. 



The 1906 hatched better when moisture was used. The method of 

 applying the zenoleum was purely experimental, and led us to believe 

 that zenoleum required to be applied thoroughly before the eggs were 

 put in. 



The chicks from the 1905 machine, when it was washed with zen- 

 oleum, were good, thrifty birds. 



