| "Illuminating | [10.] | .... | .... | 3.26 | .... | .... |
| hydrocarbons."|________|________|________|________|________|________|
| | | | | | | |
| | | 100.00 | 100.03 | 100.00 | 100.00 | 100.00 |
|_______________|________|________|________|________|________|________|
| |
|Specific gravity 0.5923 0.56 |
|_____________________________________________________________________|

Petroleum is composed of about 85 per cent of carbon and 15 per cent of
nitrogen.

Locations:

1. Petrolia, Canada.
2. West Bloomfield, N.Y.
3. Olean, N.Y.
4. Fredonis, N.Y.
5. Pioneer Run, Venango Co., Pa.
6. Burn's Well, near St. Joe., Butler Co., Pa.
7. Harvey Well, Butler Co., Pa.
8. Cherry Tree, Indiana Co., Pa.
9. Leechburg, Pa.
10. Creighton, Pa.
11. Penn Fuel Co.'s Well, Murraysville, Pa.
12. Fuel Gas Co.'s Well, Murraysville.
13. Roger's Gulch, Wirt Co., W. Va.
14. Gas from Marsh Ground
15. Baku, on the Caspian Sea.
16. Gas occluded in Wigan cannel-coal.