42 



WOOD TUKPENTINES. 



PRODUCTS. 



The analyses of the products are shown in figures 32, 33, and 34. 



HEADS. 



The heads (fig. 32) contained about 80 per cent of material of 

 complex composition, with widely varying boiling points and indices 

 of refraction; the color of this 80 per cent was darker and the odor 

 much more disagreeable than those of the last 20 per cent. The 



I2X> 130 140 150 160 170" 180 190 

 O.86 SSI & .89 .90 .91 .92 .93 

 ei/468 U70 U472 1474 1.476 1478 L480 1482 



Fia. 32. Boiling point, specific 

 gravity, and index of refraction 

 curves for " heads " obtained in 

 refining of crude turpentine No. 3. 



(60 165 170 175 180 185' 190" 195 

 O .86 .87 J38 .89 .90 .91 .92 .93 

 O 1468 1470 1472 U74 M76 L478 I.45O 



Fio. 33. Boiling point, specific 

 gravity, and index of refraction 

 curves for "hearts" obtained in 

 refining of crude turpentine No 3. 



properties of this last 20 per cent were such that it could well be 

 included in the hearts that is, the separation of heads from hearts 

 was not complete. 



HEARTS. 



The specific gravity and index of refraction of the first fraction 

 of the hearts (fig. 33) , indicated that the separation of the heads from 

 the hearts was complete, but the boiling point, the odor and color of 

 this first fraction indicated that a small amount of heads material was 

 present in the hearts. It is probable that this incomplete separation 



