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_ delicate and difficult nature, as the prevention of the mosaic or calico 
“disease and the proper composition of the tobacco leaf while ripening. 
Upon this composition depends the development of a desirable aroma 
the sweating process. Climate and weather are here such potent 
etors that human art can accomplish directly but little. Too cool 
nd rainy weather may favor, for example, the production of fatty 
patter, which certainly exerts an unfavorable effect upon the aroma 
smoking. There may be produced, however, still other products 
hich are unfavorable to the aroma. Too dry weather may also inter- 
e with the proper composition of the ripening tobacco leaves. By 
ossing and selection, however, varieties of tobacco may possibly be 
oduced that even under unfavorable climatic conditions will not form 
uch of the compounds which injure the aroma. In regard to the 
slection of the seed, it may be mentioned that even now some farmers 
» so far as to import their seed directly trom Cuba each year. 
