GUARDING AGAINST FROSTS. 207 



you are depending on that and it lasted all night and "the 

 next night and the next night too you would be out of fuel. 



A jNIember: ^Vhile you are lighting one side of your or- 

 chard and they are burned out on the other side you are only 

 partially protected at a time? 



Mr. iNlincer: That is what occurred with me when I tried 

 it. We couldn't get them all lighted in time, and after we 

 did get them all lighted the ones on the flat burned out and we 

 couldn't keep the fire going. 



Mr. Dickinson : How do you manage the oil pots in windy 

 weather? 



Mr. Mincer: There is no difftculty, the wind probably 

 wouldn't be strong enough to blow them out. If you desire 

 to put them out lay a flat piece of tin on the pot and that will 

 do it. 



A Member: How do you protect them? 



Mr. Mincer : There is a shield that fits right over the top. 

 There is a blow pipe of iron bent in the form of a V. Down 

 at the University of Missouri Dr. Howard told me that he 

 had conducted a number of experiments on peach trees there. 

 We experimented with brush, but the greatest difficulty Ave 

 had was to maintain a fire long enough. We did get some 

 absolutely certain results when we used oil heaters, they could 

 be depended upon. 



Professor Emerson : There is one of these heaters burn- 

 ing now at the South end of this building and you can put 

 it out in the wind and see how much it would stand, how much 

 it would take to blow it out. 



Mr. Howard : I want to ask Mr. Mincer if he isn't a little 

 high in his estimate of the cost of heat. I understood him to 

 say $15 an acre per night Avith 3 cent oil? 



Mr. Mincer: Yes sir. 



Mr. Howard : We have a burner here burning the kind of 

 oil of your standard burner, and we find that one of these 

 heaters will burn 6 hours without anv trouble, and for 6 hours 



