Tin: FRENCH SYSTEM APrLIED IN NORTH CAROLINA. 



103 



to each box, there would be a gain of 10,000 pounds of dip to a 

 crop of 10,000 boxes, or a gain of 35.8 barrcLs of dip above the 

 250 barrels which 10,000 boxes would have produced had each 

 box yielded 7 pounds; or there would be gotten, instead of the 

 250 barrels of yellow dip from the boxes, 285.8 barrels of virgin 

 dip by use of the cups. The difference in the amount of scrape 

 yielded by the two systems was not near so large as the difference 

 in the amount of dip. This difference, of course, was in favor of 

 the boxes and amounted to less than two pounds from all six of 

 the boxes. This loss of a pound or more was due to the loss of 

 volatile oil by evaporation and loss of scrape which hardened on 

 the old faces. This difference in favor of the boxes would amount 

 in a crop to nearly 23.5 barrels of scrape. 



The advantage in favor of the cups, however, lays not only in 

 the increased yield in pounds of turpentine, but also in the higher 

 grade of product obtained by the cups. The value of the entire 

 yield of a crop of 10,000 boxes as determined above would amount, 

 at present prices, to about one-fifth more if collected by the cup 

 than if collected in the boxes. This difference in value would be 

 distributed as follows: 



Value of 285.8 barrels of virgin dip at $1.70 per barrel, $ 485 00 



Value of 250 barrels of yellow dip at |1.50 per barrel | 375 00 



And value of larger yield of 23.5 barrels of scrape at 



11.10 per barrel 26 00 401 00 



Difference in favor of cups I 84 00 



There is an increase in value amounting to |84, or over 20 per 

 cent, gain, even when the cups are substituted in the place of 

 second-year boxes, and the rate of increase in value of products 

 becomes larger each succeeding year. 



As in the other experiment both cups and boxes were tried on 

 first-year faces, of the same length, no difference is expected in the 

 result in favor of either system. It was intended, when this experi- 

 ment w^as begun, to move the cups, at the middle of the season, 

 up to the top of the face which had at that time been chipped. 

 This should have yielded, in the cups, a slightly larger amount of 

 dip turpentine than was collected in the boxes, and the grade of 



