After considering the facts so far detailed, many other advantages, connected with the gas-light illumination, will naturally suggest themselves to the reader. I have endeavoured merely to point out the leading characters of the new lights, as they are at present. Ingenious men may speculate from what has been done to what remains to be effected, which, no doubt, will embrace objects of the greatest utility and most extended national importance. The public attention is awakened to the new properties of coal, and will not rest till they are extensively applied to economical purposes. The consequence will be, a considerable defalcation in the revenue. For, in proportion as the gas-lights are more or less generally adopted in all towns of the country, the consumption of oil and tallow will be diminished, and the impost on those articles become less productive; and when this takes place, Government, no doubt, will share in the profits, by levying a tax on the new lights. The Exchequer will thus have nothing to fear; as one branch of the revenue fails, another, and a more productive one, will supply its place. Upon the whole, when we reflect that the object of the gas-light illumination is to open a source of national wealth, of which nothing can deprive us, to create, we may almost say, new articles of value, its friends cannot be thought guilty of great presumption, if they look forward with confidence to the successful extension of this new art of civil economy; and if, contrary to all expectations, the effects of jealousy and prejudice should, in some respect or other, continue here and there its influence against this new art of procuring light, a firm perseverance of its application must at length remove that ignorance which alone can give them birth. TABULAR VIEW, EXHIBITING The quantity of GAS, COKE, TAR, PITCH, ESSENTIAL OIL, and AMMONIACAL LIQUOR, obtainable from a given quantity of COAL; together with an Estimate of the quantity of Coal necessary to produce a quantity of Gas, capable of yielding a Light equal in duration of time and intensity to that produced by Tallow Candles of different kinds. -----------+------------------------------------------ | _Cost of Coal._ | Minimum. Maximum. Average. -----------+------------------------------------------ One Chal. }| of Coal, }| 40_s_ to 60_s_ -- 50_s_ from 25 to}| 28 cwt. }| One Ton | 30_s_ to 48_s_ -- 38_s_ 6_d_ One Sack | 3_s_ 4_d_ to 5_s_ -- 4_s_ 2_d_ One Bushel | 1_s_ 2_d_ to 1_s_ 8_d_ -- 1_s_ 5_d_ One Peck | 3½ to 5_d_ -- 4¼ One Pound | ¼ -----------+------------------------------------------