DEVELOPMENT OF CUBAN PINE. 87 



TABLE II. Growth of Cuban Pine during middle and last stages of life, from forty to one hundred and forty-five yearn. 



From Table III the rapid growth of this species is quite apparent. It will be observed that 

 good trees are about 20 feet high at ten, 45 feet at twenty, and over 80 feet high at fifty years 

 of age, when the rapid rate of upward growth comes to a stop. It appears, also, that the greatest 

 mass of wood for any decade is formed atthe early age of fifty, the growth in volume being nearly 

 15 cubic feet for these ten years, and that at ninety the growth in volume is only about two-thirds 

 of the maximum ; that at one hundred years the average annual growth nearly equals the current 

 growth, thus indicating that the age of proper exploitation has been reached, i. e., that now the 

 tree is ripe for the ax, as far as profitable growth, represented in volume accretion, is concerned. 



TABLE III. Growth of Cuban Pine. 



