Philosophical Transactions of the Royal Society of London, Volumen 106W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1816 |
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angles animal apertures appear arbitrary function axis Barom black spaces carbonic acid colchicum autumnale colours compressed containing depolarising dilatation doubly refracting dx dx edges effect electrical organs equal equation becomes equation PROBLEM exhibited explosive mixture exterior set fire-damp flame fluxion func functional equations given equation Given the equation Hazy heat homogeneous function hot iron inch interior fringes isinglass lantern longitude MDCCCXVI metallic METEOROLOGICAL JOURNAL method Moo Moo Moo observed original equation parallelopiped particular solution plate of glass polarised light polarised ray produced PROPOSITION quadrant Rain this Month result right ascension second function second order sets of fringes shown in Fig similar simultaneous function solved structure substituted suckers surface symmetrical function temperature Therm thick tints tion variables W 1 Cloudy
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Página 10 - It is evident, then, that to prevent explosions in coal mines, it is only necessary to use air-tight lanterns, supplied with air from tubes or canals of small diameter, or from apertures covered with wire gauze placed below the flame, through which explosions cannot be communicated...
Página 6 - TSJ when it was placed between the exploding vessel and the bladder, though it did not present a surface of more than half a square inch, and the explosive mixture in the bladder in passing through it to supply the vacuum produced...
Página 110 - ... be considered as the combustion of an explosive mixture of inflammable gas, or vapour and air; for it cannot be regarded as a mere combustion at the surface of contact of the inflammable matter : and the fact is proved, by holding a taper or a piece of burning phosphorus within a large flame, made by the combustion of alcohol, the flame of the candle or of the phosphorus will appear in the centre of the other flame, proving that there is oxygen, even in its interior part...
Página 7 - ... of an inch, and their depth considerable in proportion to their diameter ; and that explosions could not be made to pass through such canals, or through very fine wire sieves, or wire gauze.
Página 8 - As the wick may be moved without communication between the air in the safe lantern or lamp and the atmosphere, there is no danger in trimming or feeding them ; but they should be lighted in a part of the mine where there is no fire-damp, and by a person charged with the care of the lights : and by these inventions, used with such simple precautions, there is every reason to believe a number of lives will be saved, and much misery prevented. Where candles are employed in the open air in the mines,...
Página 96 - A thick glass, though as much or more permeable to light than a thin glass of worse quality, allows a much smaller quantity of radiant heat to pass.
Página 11 - I threw into the safe-lantern with the common chimney, a mixture of 15 parts of air and 1 of fire-damp: the flame was immediately greatly enlarged, and the flame of the wick seemed to be lost in the larger flame of the firedamp. I placed a lighted taper above the orifice of the chimney: it was immediately extinguished, but without the slightest previous increase of its flame, and even the wick instantly lost its fire by being plunged into the chimney. I introduced a lighted...
Página 10 - ... the foul air ; and common lanterns may be easily adapted to the purpose, by being made air-tight in the door and sides, by being furnished with the chimney, and the system of safety apertures below and above.
Página 26 - I believe this apparatus has not yet been used in any of the collieries. The common means employed for lighting those parts of the mine where danger is apprehended from the fire-damp, is by a steel wheel, which, being made to revolve in contact with flint, affords a succession of sparks: but this apparatus always requires a person to work it; and, though much less liable to explode the fire-damp than a common candle, yet it is said to be not entirely free from danger. Mr. Buddie having obligingly...
Página 4 - ... 13 and 14 parts, still inflamed, but the violence of combustion diminished. In 1 part of gas and 15 parts of air, the candle burnt without explosion with a greatly enlarged flame ; and the effect of enlarging the flame, but in a gradually diminishing ratio, was produced as far as 30 parts of air to 1 of gas.