| Pennsylvania— | |||
| Lyken’s Valley | 1·327 | 2240 | |
| Lebanon Co., Grey Vein | 1·379 | 2327 | |
| Schuylkin Co., Lorberry Creek | 1·472 | 2484 | |
| Pottsville, Sharp Mount | 1·412 | 2382 | |
| Peach | 1·446 | 2440 | |
| Salem Vein | 1·574 | 2649 | |
| Tamaqua, North Vein | 1·600 | 2700 | |
| Maunch Chunk | 1·550 | 2615 | |
| Nesquehoning | 1·558 | 2646 | |
| Wilkesbarre, best | 1·472 | 2884 | |
| West Mahoney | 1·371 | 2313 | |
| Beaver Meadow | 1·600 | 2700 | |
| Girardville | 1·600 | 2700 | |
| Hazelton | 1·550 | 2615 | |
| Broad Mountain | 1·700 | 2869 | |
| Lackawanna | 1·609 | 2715 | |
| Massachusetts— | Mansfield | 1·710 | 2882 |
| Rhode Island— | Portsmouth | 1·810 | 3054 |
| Average in United States | 2601 | ||
The calorific value of anthracite coal is well shown by the following results from Dr Fyfe’s experiments, to compare Scotch and English bituminous coals with anthracite, in regard to their evaporative power, in a high-pressure boiler of a 4-horse engine having a grate with 8·15 square feet of surface; also in a waggon-shaped copper boiler, open to the air, surface 18 feet, grate 1·55:—
KEY:
A - Pounds burnt per hour on the Grate.
B - Duration of the Trial in hours.
C - Temperature of the Water.
D - Pounds of Water evaporated from the initial Temperature by 1 lb. of coal.
E - Pounds of Water at 212° from a lb. of Coal.
F - Coal per hour on one sq. ft. of Grate.
G - Time in seconds of consuming 1 lb. of Coal.
H - Pounds evaporated per hour from each sq. ft. of surface.
| Kind of Fuel employed. | A | B | C | D | E | F | G | H | Remarks. |
| Middlerig Scotch coal | 81·33 | 9 | 45° | 6·66 | 7·74 | 10·00 | 44·27 | ... | Pressure 17 lbs. per square in. |
| Scotch coal, different variety from preceding | 108 | 5 | 170° | 6·62 | 6·89 | 13·25 | 33·33 | ... | Ditto. |
| Anthracite | 47·94 | 81⁄2 | 45° | 8·73 | 10·10 | 5·88 | 75·09 | ... | Ditto. |
| Scotch coal, from near Edinburgh | 8·24 | 81⁄2 | 50° | 5·38 | 6·90 | 5·31 | 436·89 | 3·15 | Lower pressure, open copper boiler. |
| English bituminous coal | 6·07 | 8·4 | 50° | 7·84 | 9·07 | 3·91 | 503·08 | 3·06 | Ditto. |
Space will not admit of our entering fully into the question of the evaporative power of anthracite, but its advantages under certain conditions are fully established.
AN′THRACOKA′LI. [Eng., L.] Syn. Anthrakoka′li, Anthrak′ali; An′thracoka′li, Hamb. C. 1845. Prep. 1. (Polya.) Carbonate of potassa, 6 oz.; quick-lime, 31⁄2 oz.; water, 4 pints; proceed as directed for solution of potassa, then evaporate the clear liquid, in an iron capsule, to about 6 fl. oz., add of finely powdered mineral coal 5 oz., boil, with constant stirring, to dryness, and continue the stirring at a reduced heat, until the whole is converted into a homogeneous black powder, which must be at once placed in small, dry, and well-stoppered phials.
2. (Hamb. C. 1845; Ph. Baden, 1841.)
Hydrate of potassa, 7 dr.; melt, add of cannel coal, 5 dr., and then proceed as before.
Prop. &c. A deliquescent black powder, with a caustic taste, and empyreumatic smell; 10 gr. with 1 fl. oz. of water, after filtration, forms a clear, dark brown solution, giving a precipitate with acids, without effervescence.—Dose, 1 to 3 gr., twice or thrice daily; and externally, made into a pomade or ointment (1⁄2 to 1 dr., to lard, 1 oz.); in skin diseases (particularly herpetic eruptions), scrofula, chronic rheumatism, &c. It has been highly extolled by Dr Gilbert, and by its inventor, Dr Polya; but apparently undeservedly.
Anthracokali Sulphuretted. Syn. Anthracokali sulphuretum, L. Prep. (Polya.) As formula 1 (above), but adding sulphur, 4 dr., immediately after stirring in the powdered coal.—Dose, use, &c., as the last. See Fuligokali.