110 Fruit-growing in Arid Regions 



ing from the top of a 12-foot ladder, while the owner 

 of the second would be ashamed to possess one over 6 

 feet in height. The spread of the second tree will always 

 exceed its height, which means that the angle at the lower 

 point of a circumscribed triangle will always exceed 60, 

 and should rarely exceed 90. 



