Coverage Possibilities of a Fine Mi st Spray The numbers of droplets per square 

 inch resulting from the distribution of a gallon of liquid uniformly over a 

 surface of one acre are indicated by the following data. (A micron is about 

 1/25000 of an inch and 1000 microns are equal to about l/25 of an inch): 



Diam , of Droplets Number of Droplets per Square Inch 



in microns _______ ___, ______ ' 



60 9224 



100 1164 



200 142 



500 , 9  



1000 • 1.1 



In still air, droplets 50 microns in diameter require about 5.4 minutes to fall 

 50 feet, v/hile those with a diajueter of 5 microns require about 5,5 hours to fall 

 the same distance. 



A Sling Psychrometer in Every Storage To eliminate guesswork concerning 

 "the relative humidity'~Tn an apple storage every storage owner should own 

 and use a sling psychrometer, more commonly knovm as a wet and dry bulb 

 thermometer. The cost amounts to about 4 or 5 dollars. Proper relative 

 humidity and proper temperature go hand in hand in the maintenance of top 

 quality. Premature ripening as well as shrivelling are prevented by keeping 

 both of these factors as nearly ideal as possible. Experiments show that 

 an apple loses more v^ater at 50° and relative humidity 80^i, than it does at 

 30° and relative humidity 10%» 



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A Now Bulletin , "Apples as Food " This ue^v publication. Bulletin 

 No, 440, by Essolon, F'-jlli^rs and C-utowska, is now available from 

 the Mailing Room at the University or from your County Extension 

 office. It covers the folloT,;ing topics j History of the apple, 

 production and consumption, composition of applos, factors affec- • 

 ting composition, effect of processing fmd cooking on composition 

 and nutritive value, and physiological and therapeutic pr-iperties 

 of apples. It also contains a very complete bibliography. 



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Menacing Mummies Peach mummies are the result of decayed peaches from 

 previous years and yet they are themselves extremely resistant to further 

 decay. Their rolo in the spread of Broxm Rot is a dual affair. Not only 

 do the partially buried mximmles on the ground give rise to spores which 

 develop in large numbers in the toadstool-like grov/ths, but the dried 

 mummies on the tree may themselves take on a grayish appearance and 

 produce so-called conidiocporos. Those mummies are a menace whether on 

 the tree or on the ground. Light cultivation during the spring season 

 tends to breaic off the fruitin^ bodies from the mummies on the ground 

 and thus prevent the maturity of spores. It is not very commonly known 

 that a mummy may lie dormtmt for 3 to 5 years only to function as a 

 spore producer wiien conditions become favorable as for example, whon 

 tl-iC mummy becomes covered by a thin layer of moist soil. Brov;n rot 

 control is greatly simplified if all of the mummies are dostroyejd or 

 treated in such way as to prevent spore development, 



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