yS THE CULTIVATION OF THE 



and often during one of these seasons we know that 

 Yellows flourishes ; I think this is a practical proof of its 

 germ-origin. Thos. Taylor, of the Agricultural Depart- 

 ment, Washington, has examined and experimented 

 with the bark of healthy and unhealthy Peach trees, and 

 found a fungus in the unhealthy, the healthy bark being 

 free from fungi. Mr. Taylor had leaves of the healthy 

 and unhealthy trees analyzed, and found as follows : 



Healthy Peach Leaves. Unhealthy Peach Leaves. 



Moisture 29.20 36.9 



Organic Matter 63.22 59.4 



Ash 7.58 3.7 



Total 100.00 Total, 100.00 



Here, in the unhealthy tree there is a deficiency of 

 ash ; there is less organic matter and more moisture than 

 in healthy leaves. Now, Mr. Taylor says, as leaves don't 

 absorb earthy matter from the atmosphere, it is evident 

 that the cellular structure of the tree has failed to 

 perform its functions, for had the ascending sap carried 

 up potash, lime, or other earthy matter, the leaves would 

 have been stored with them, since they can't evaporate 

 them. This deficiency of earthy matters in the leaves 

 may account for the absence of ash in the fruit. If the 

 leaves elaborate juice for the growth of the fruit, the 

 leaves being deprived of proper nourishment, the fruit 

 cannot mature. Now trees with yellows, fruit earlier 



