452 KEPORT OF NATIONAL MUSEUM, 1899. 



Colorado. — Dull black, hard, and pulverizable; melting point, 76° C. 

 Yields on distillation: 



Percentage 

 (l)y difference). 



Paraffin and oil 90. 00 



Loss in gas 2. 12 



Loss in water 2. 60 



Residue 5. 28 



100. 00 



It commences to distill at 360° C, when nearly 8 per cent of oil 

 setting at 30° C. comes over. At a much higher temperature it dis- 

 tills steadily and furnishes a product suitable for use as a source of 

 paraffin. 



Baku. — ^Specific gravity, 0.908; melting point, 76° C. : 



Paraffin mass 81. 80 



Gas 13. 80 



Coke 4. 40 



100. 00 



Persia. — Dark green, rather hard; specific gravity, 0.925: 



Light oil, 0.740 to 0.780 2. 35 



Light oil, 0.800 to 0.820 3. 50 



Oil, 0.880 16. 63 



Paraffin 53. 55 



Coke 16.73 



Loss 7. 24 



100. 00 



England (Urpeth, near Newcastle). — Soft and sticky, brownish. 

 Specific gravity, 0.890; melting point, 60° to 70° C: 



Light oil, boiling point 80° to 120° C 3. 00 



Light oil, Iwiling point 150° to 200° C 7. 50 



Lubricating oil, boiling point 200° to 250° C. 7. 80 



Paraffin 64. 95 



Coke 11. 15 



Gas, loss 5. 60 



100. 00 

 Boryslaw. — Specific gravity, 0.980 — I, dark yellow; II, dark 

 brownish black: 



