-----------+----------------------------------- | _Weight of Coal._ | Min. Max. Aver. -----------+----------------------------------- One Chal. }| of Coal, }| 2,800 to 3,136 -- 2,968 from 25 to}| 28 cwt. }| One Ton | 2,240 One Sack | 233 to 261 -- 247 One Bushel | 78 to 87 -- 82½ One Peck | 19½ to 21¼ -- 20¼ One Pound | 1 -----------+-----------------------------------
-----------+-------------------------------- |_Produce of Gas, in cubic feet._ | Min. Max. Aver. -----------+-------------------------------- One Chal. }| of Coal, }| 8,906 to 11,872 10,388[39] from 25 to}| 28 cwt. }| One Ton | 6,720 to 8,960 -- 7,840 One Sack | 741 to 988 -- 814 One Bushel | 247 to 330 -- 290 One Peck | 61 to 82 -- 71½ One Pound | 3 to 4 -- 3½ -----------+--------------------------------
-----------+----------------------------------------- | } |_Candles._ | } |9,516 11 to the pound. One Chal. }| }[39]Equal to |8,651 10 do. of Coal, }| }as many tallow |7,786 9 do. from 25 to}| }candles, 12 in |6,921 8 do. 28 cwt. }| }the pound, |6,556 7 do. | }burning two |5,194 6 do. One Ton | }hours; or to |4,325 5 do. One Sack | } |3,463 4 do. One Bushel | } |2,595 3 do. One Peck | } |1,730 2 do. One Pound | } | 866 1 do. -----------+-----------------------------------------
COKE.--One chaldron of coal, from 25 to 28 cwt. gives 1¼ to 1½ chaldron of Coke.
TAR.--One chaldron of coal, from 25 to 28 cwt. gives from 150 to 180lb. of Tar,[39] or 15 to 18 ale gallons, 10lb. each.
AMMONIACAL LIQUOR.--One chaldron of coal, gives from 220 to 240lb. of Ammoniacal Liquor, or 22 to 24 ale gallons.
[39] 1000lb. of Coal-Tar afford by distillation, from 260 to 265lb. of Essential Oil, or Naphtha. 1000lb. of Coal-Tar produce by mere evaporation, from 460 to 480lb. of Pitch.
_Tabular View, exhibiting the illuminating power of Coal-Gas, compared with the illuminating power of Tallow Candles of different sizes._
One chaldron of Coal produces, according to weight and quality, Cubic feet of Gas. Average. Burning. Candles. 12 to 1lb. 6 to 1lb. From 9,000 to 12,000 10,500 1 hour = 21,000 = 10,500 ----- ------ ------ 2 hours = 10,500 = 5,250 6,000 8,000 7,000 3 ditto = 7,000 = 3,500 4,500 6,000 5,250 4 ditto = 5,250 = 2,625 3,600 4,800 4,400 5 ditto = 4,400 = 2,200 3,000 4,000 3,500 6 ditto = 3,500 = 1,750 2,571 3,428 3,005 7 ditto = 3,005 = 1,502 2,250 3,000 2,625 8 ditto = 2,625 = 1,312 2,000 2,666 2,333 9 ditto = 2,333 = 1,166 1,800 2,100 2,100 10 ditto = 2,100 = 1,050 1,636 2,191 1,913 11 ditto = 1,913 = 956 1,500 2,000 1,750 12 ditto = 1,750 = 875 1,384 1,846 1,615 13 ditto = 1,615 = 807 1,285 1,714 1,499 14 ditto = 1,499 = 749 1,200 1,600 1,400 15 ditto = 1,400 = 700 1,125 1,500 1,312 16 ditto = 1,312 = 656 1,058 1,111 1,234 17 ditto = 1,234 = 617 1,000 1,333 1,166 18 ditto = 1,166 = 583 947 1,263 1,105 19 ditto = 1,105 = 552 900 1,200 1,050 20 ditto = 1,050 = 525 857 1,143 1,000 21 ditto = 1,000 = 500 818 1,095 956 22 ditto = 956 = 478 783 1,044 913 23 ditto = 913 = 456 750 1,000 875 21 ditto = 875 = 437