Nitrogen, coal-gas, and carbonic acid have also been employed as ansthetics.
From its extreme lightness it has been used to fill balloons, but coal-gas is now commonly employed for this purpose.
The seal should have twice or thrice the depth it usually has for coal-gas.
It is usually filled with coal-gas, which has a lifting-force of 35 lb.
Secondly, the mains and service-pipes required for acetylene are smaller, cateria paribus, than those needed for coal-gas.
Long before this Dr. Clayton described some observations on coal-gas, which he called "the spirit of coals."
A balloon may be made lighter than air by filling it with heated air or coal-gas.
Besides the coal-gas, various by-products are obtained depending upon the raw materials, upon the procedure, and upon the market.
coal-gas produced almost immediate insensibility, with a few feeble attempts at revival, but in no case effectual.
The production of coal-gas per ton of coal is of the order of magnitude of 10,000 cubic feet.