September, 1920 



rainy weather the average was about 

 fifteen per cent to twenty per cent and 

 at times ran as low as five per cent. 

 These facts become important when we 

 consider the importance of returning 

 some of the heated air, passing it over 

 the fruit a second time. By mixing some 

 outside air with that already heated to 

 135 degrees and passing this mixture 

 over the furnace, the humidity could be 

 controlled and the amount of heat re- 

 quired lessened. 



When air is taken in the furnace pit 

 at a temperature of forty-five to seventy 

 degrees, which commonly occurs during 

 the period of evaporation, a large 

 amount of heat is required to raise the 

 temperature to 160 degrees. Since the 

 air passes off at the upper end at a 

 temperature of 120 to 140 degrees, a 

 large amount of heat is lost. The re- 

 moval of the moisture from the air by 

 condensation is doubly expensive in 

 that the cost of cooling is added to that 

 of reheating air from a low to high 

 temperature. If, by the use of forced 

 air currents, the greater part of the air 

 could be returned to the furnace pit at 

 a temperature of 120 degrees or better, 

 much of the cost of heating could be 

 reduced. Possibly methods will be 

 evolved, some time, so that much of the 

 heat which is now entirely lost can be 

 used. 



As soon as the prunes are finished 

 they should be removed from the trays 

 while still warm, the dobies should be 

 re-trayed and re-dried. The prunes are 

 then taken to the bins or piles to cure 

 until sold or ready for processing. 



BETTER FRUIT 



Page 



Meet Me at the 

 Big Hood River Fair 



Sept. 17th and 18th 



UNQUESTIONABLY 



<L Modern methods applied 

 to fruit growing have made 

 the Northwest a great fruit 

 growing center, with possi- 

 bilities of extensive develop- 

 ment. 



<L Modern methods applied 

 to banking have made the 

 FIRST NATIONAL BANK 

 pre-eminently the ally of the 

 horticulturist. Its facilities, 

 service and the personal in- 

 terest of its officers are at 

 your disposal. 



THE FIRST NATIONAL BANK. 



OF PORTLAND OREGON 



g 



£ 



OREGON STATE FAIR 



SALEM 



September 27 



—TO- 



October 2 



A Wealth of Agricultural Displays 



Magnificent Livestock Exhibition 



Complete Machinery and Tractor Exhibit 



Splendid Night Horse Show 



Superb Speed Program 



High Class Amusements 



Special Attractions Both Day and Night 



Free Camp Grounds 



Excursion Rates on All Railroads 



For Further Particulars Write 

 A. H. LEA, Secretary, Salem, Oregon 



Red Crown gasoline 

 has a continuous chain 

 of boiling points. It is 

 an all'refinery gasoline. 



STANDARD OIL COMPANY 



(Calif ornia 



VKiriNC, ADVERTISERS MK 



IN BETTER FR 



