342 B. Silliman on Petroleum from California, 
When about 485 ¢.c. had passed over, the temperature rose 
370°C. 
Sp. gr Beaumé. Expl. test 
Ist, 100 c.e, 755 55°77 
2nd,100 “ "75 51°80 70° * 
8rd, 100 “ 793 47-62 roo? 
4th, 100 * 815 42-70 156°“ 
5th, 1¢c0 838 87°83 196° “ 
6th, 100 * 867 82:08 sot 
Sth, 60 « 872 81°13 190° “ 
8th, 100 « 890 27°79 131° 
9th, 100 « 900 26-00 YE te. 
10th, 100 « 900 26°00 140° 
rectified products would arrange themselves thus by color— 
i 2nd, 3rd, fractions. 
II. 4th, 5th, 6th, 7th, c 
Ill. 8th, 9th, 10th, zi 
But in the actual conduct of the manufacture of this oil, I 
presume the distiller would make three divisions: ; 
Ist, Light oil, including the Ist fractions, about 53°5° commercial. 
2d, Burning oil, “ 8. M0 7 5 ©. O65 320 
3d, Lubricating oil, “8.19 = * «ee, 
By mingling a portion of the light oil with the heavier, it is 
probable that a product of about 60 per cent would be obtained 
suitable for illumination. ‘ Sony 
he light oil and the burning oil are perfectly decolorized by 
the usual treatment with sulphuric acid and carbonate of soda. 
