Chalk, in fact, is a compound of carbonic acid gas, and lime, and when you make it very hot the carbonic acid flies away and the lime is left.

"That's how poisonous volcanic gas is," said the surgeon to his commanding officer.

In the production of Aërated Bread, wheaten flour, water, salt, and carbonic acid gas (generated by proper machinery), are the only materials employed.

I had been considerably startled when the lights burnt first green and then red; but had been momentarily under the impression that the change was due to some influx of noxious gas into the room.

Just below the extreme summit hot sulphurous gases and vapor issue from irregular fissures, mixed with spray derived from melting snow, the last feeble expression of the mighty force that built the mountain.

All carried vacuum-flashlights in their overcoat pockets, and lethal-gas pistols, in addition to ordinary revolvers or automatics.

At the famous sacred Fire wells of Baku, in the Eastern Caucasus, the ejections of mud and inflammable gas are so mixed with asphaltic products that Eichwald says 'they should be rather called naphtha volcanoes than mud-volcanoes, as the eruptions always terminate in a large emission of naphtha.'

The shops of medicine are supplied with resins, balsams, and essential oils; and the tar and pitch, for mechanical purposes, arc produced from these vegetable secretions.] 185 In sulphurous eddies round the weird dame Plays the light gas, or kindles into flame.

The humid air and light winds permitted great waves of the deadly gases to creep low toward the Italian lines, the rear guards protecting themselves with gas masks and by hiding in caverns.

After the dry residue is obtained, continue to apply heat; observe that it chars and gives off pungent gases.

Into this globe the flour is dropped till it is full, and then the common atmospheric air is pumped out, and the pure gas turned on.

"About as healthful as prussic acid, those volcanic gases," explained the surgeon.

The volatile gases burn more readily than the carbon, and are the first substances to be driven off, so that the carbon is left behind nearly pure.

This objection, always in force, is still more objectionable at night-time, when doors and windows are closed, and amounts to a condition of poison, when placed between two adults in sleep, and shut in by bed-curtains; and when, in addition to the impurities expired from the lungs, we remember, in quiescence and sleep, how large a portion of mephitic gas is given off from the skin. 2471.

The first method has, to a considerable extent, failed on account of the inefficient way in which the compressed gas was employed to propel the torpedo.

Use as little gas as possible, but keep in the air.

As to the principal gases, the air of the city does not differ materially from that of rural sections.

The carbonic acid formed rises over the glowing coke, and takes up another atom of carbon to form the combustible gas carbonic oxide.

A limited number are still made for travellers and for remote countries that have not cartridges, the electric light, or even incandescent gas, within their reach.

As wind is known to be composed of two distinct gases, Crusoe felt perfectly safe in replying "Yes" with his tail.

How such a creaky person came to be a bath-chair man I could not think, but it may be that he wanted to stay in Buxton for the sake of the loose gas which could be had for nothing, and that bath-chairing was all he could get to do.

In mines of true coal, not only is choke-damp given off, but that more terrible pest of the miners, fire-damp, or explosive carburetted hydrogen and olefiant gases.

The balloon was so much larger that the less expensive but heavier illuminating gas could be used instead of hydrogen.

The piston of the gasoline engine, however, working by the force of exploded gas, produces power when moving in one direction onlythe piston-head is pushed out by the force of the explosion, just as the plunger of a bicycle pump is sometimes forced out by the pressure of air behind it.

With unexpectedly powerful artillery suddenly concentrated, with high explosives, with asphyxiating gas, with a well-organised system of grenade throwing and mining, with attacks of flaming gas, and above all with a vast munition-making plant to keep them going, they had a very reasonable chance of hacking their way through.