And it was not until the incandescent mantle was perfected that gas as a brilliant illuminant was able to make a stand against its new competitor.
It was, in short, the cheapestilluminant known, generated by an apparatus that was simplicity itself.
For although it had been known as a possible illuminant for many years, the calcium carbide for producing it could not be manufactured economically until the advent of the electric furnace, itself the outcome of Davy's arc light.
No importance was attached to these discoveries, however, and nothing was done with acetylene as an illuminant until the last decade of the nineteenth century.
Solar oil, a paraffin oil used an illuminant and lubricant.
The time a safety lamp will continue to burn with a full charge of illuminant will be determined.
Wicks in lamps must be of sufficient length to be at all times in contact with the bottom of the vessel in which the illuminant is contained, and, before it is used, the wick shall be dried to remove moisture.
The ideal illuminant and the ideal heating agent must be one in which the required waves are in a great majority.
This should be obvious when it is considered that an object which is red under an illuminant containing all colors such as sunlight would be black or dark gray under monochromatic yellow-green light.
Mineral oil was introduced as an illuminant in 1853, and the modern lamp came into use.
The white flame-arc obtained by the use of rare-earth compounds in the carbons provides an illuminant closely approximating average daylight.
Obviously, the colors generally appear different when another illuminant is used.
From this early beginning gas-light remained for a long time the only illuminant supplied by a public-service company.
Therefore, one illuminantmay be superior to another for one photochemical reaction, while the reverse may be true in the case of another reaction.
An illuminant of this character can be obtained efficiently by using a properly tinted bulb on tungsten filament lamps.
Inasmuch as the fastness of colors in daylight is usually of interest, the artificial illuminant used for color-fading should be spectrally similar to daylight.
For domestic purposes the commonest illuminant was "camphine," an oil distilled from turpentine.
The more important advantages of acetylene as an illuminant have now been indicated, and it remains to discuss the cost of acetylene lighting in comparison with other modes of procuring artificial light.
By far the most important chemical reactions of acetylene in connexion with its use as an illuminant or fuel are those which it undergoes with certain metals, notably copper.
The superiority of acetylene in respect of brilliancy and portability will at once suggest its employment as the illuminant in the "light" moth-traps which entomologists use for entrapping moths.
The illuminant which acetylene is best fitted to supersede on the score of convenience, cleanliness, and hygienic advantages is oil.
Acetylene is a very useful and powerfulilluminant when all else fails.
The character of the illuminant also can be varied.
In the ordinary projector, if the celluloid film is stopped in the gate for a fraction of a second, and is exposed to the light, it flares up instantly, owing to the great heat emitted by the illuminant and the high inflammability of the film.
So far as the illuminant is concerned this depends upon circumstances.
Moreover, we are now talking about the use of carbureted water gas as an enricher of coal gas, and not as an illuminant to be consumed per se.
But even should a huge monopoly be created, I think I have found a source of light at home which will hold its own against any foreign illuminant in the market.
When petroleum began to be used as an illuminant it is impossible to say.
The first really definite statement as to the use of petroleum as an illuminantis Strabo's quotation (XVI.
The whole question of optical adjustments has, however, been left over for a future chapter, as it more or less applies to whatever illuminant is used.
Having fixed the position of the lantern, it should be got into place, the cable or tubing connected or whatever else is necessary, according to the illuminant to be used.
The same remark applies to every lantern illuminant {8} which is supplemented by a reflector, and it is extraordinary how often it is neglected by the manufacturer.
It will then be mixed with the gas from the retorts, and will supply a far higher illuminant than we at present possess.
Use of Alcohol for Industrial Purposes and for Use as a Heating Agent, as an Illuminant and as a Source of Motive Power.
Testing Qualities of anIlluminant -- Influence of the Absorption Spectrum in Changes of Hue under the Artificial Lights -- Study of the Causes of Abnormal Modifications of Hue, etc.
Remembering the unprogressive character of Chinese arts and industries, there is ground for the belief that they may have been using this natural gas as an illuminant these hundreds of years.
Moreover, just about the time that Edison took up incandescent lighting, water-gas was being introduced on a large scale as a commercial illuminant that could be produced at a much lower cost than coal-gas.
For more than thirty years the arc light remained an expensive laboratory experiment; but the coming of the dynamo placed thatilluminant on a commercial basis.
Wherever a single lens is used, the light around the edges of the illuminated space is always more or less colored, varying with the illuminant used.
If we are copying in the camera with daylight as illuminant it is very important to use the light from the north; if we use other light we shall be much put out on most occasions by awkward variations of the brightness.
The most efficient artificial illuminant therefore has about 4 per cent.
It is largely used as an illuminant and for the production of great heat.
As anilluminant the gas is produced in specially-constructed generators.
I lay great stress on this, because I am confident that this is in every way the best illuminant that can be taken for a Polar winter, and no future expedition should fail to supply themselves with it.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "illuminant" in a variety of sentences. We hope that you will now be able to make sentences using this word.
