100 



FORESTS, FOREST LANDS AND FOREST PRODUCTS. 



since it is a matter of both time and expense to grow a body of 

 pines suitable for tapping. 



THE YIEI^D BY THE FRENCH SYSTEM LARGER IN QUANTITY AND BETTER IN 



QUALITY. 



B}^ using the cup for collecting the turpentine and moving it up 

 each year, so that it will be just below the freshly hacked surface, 

 a larger quantity of purer and hghter colored dip is gotten than 

 would be possible under the American plan, and the material thus 

 collected corresponds always to the virgin dip; it is very free from 

 bark and makes an exceedingly high grade rosin. Under this 

 arrangement there is very little scrape, the surface hacked that 

 season being all that has scrape on it. The increased production 

 in France by use of the cup method amounted to four pounds of 

 spirits of turpentine and seven pounds of rosin from every 100 

 pounds of crude turpentine, and besides there were no chips or 

 trash of any kind in the crude material. The spirits of turpen- 

 tine manufactured is of a better grade than that made from crude 

 turpentine collected by the old method, being distilled'at a lower 

 temperature and with less .heat, and all of the rosin, except a small 

 proportion made from the scrape, is of a high grade. 



The value of a barrel of the crude turpentine collected by the 

 cups is about one-fourth greater than that collected by the former 

 system. By the cup method there is also a large saving in labor, 

 both in scraping and dipping, and there is no loss of turpentine in 

 dipping from a box to a bucket. 



RESULTS OF EXPERIMENTS WITH THE FRENCH SYSTEM IN NORTH 



CAROLINA. 



During the season of 1894 a trial on a limited scale was made 

 to test the merits of the French system and to ascertain by its 

 direct application to the long-leaf pine the exact increase of tur- 

 pentine collected by it above that yielded b}^ the American practice. 



In order to reduce to a minimum the chance of errors it was 

 decided to conduct the experiments at three separate stations under 

 direction of different persons. At two of these stations the tur- 

 pentine was to be gotten from second-year boxes and at the third 



