THE CULTURE OF FLUE-CURED TOBACCO. 31 
As soon as the leaf is dead or dry, further yellowing takes place 
only very slowly, and if there yet remains any considerable amount of 
moisture in the leaf a red or brown color will immediately begin to 
develop. In curing, one should keep well in mind the principle that 
it is necessary to preserve the life (cell activity) and at least some 
of the moisture while the leaf is yellowing, and so manage as to have 
the moisture exhausted by the time it is completely yellow, or, rather, 
a little before it is fully yellow, as the most satisfactory cures and 
clearest colors generally follow when the leaf is dried out with some 
green remaining in it. Tobacco yellows best, especially in the first 
stages, when the temperature of the barn ranges from about 80° to 
Fic. 10.—Harvesting tobacco by the whole-plant method, showing a good type of 
hauling frame, which should be more generally used. 
100° F., but it will continue to yellow in the later stages up to 115° 
or 120°. As the yellowing proceeds, it is well, toward the later 
stages, to increase the heat slowly toward these higher temperatures 
and to begin to dry a little on the yellowest leaves by admitting a 
little extra ventilation. 
In order to obtain the best results in yellowing under varied con- 
ditions, it is best to have the barn very tight, so that in the earlier 
stages of yellowing the desired temperatures may be obtained with- 
out exhausting the moisture too rapidly. As the yellowing pro- 
gresses, however, it is necessary that this moisture be gradually and 
later rapidly removed; and to accomplish this to the best advantage 
