A sheet of paper is coated with gelatine alone, this being rendered sensitive to light by means of certain chemicals and then printed under a negative.
The first step toward changing this to a bromoil is to treat it with certain chemicals that bleach out the silver image and at the same time harden the gelatine in proportion to the amount of silver present.
In modern practice this light-sensitive chemical is almost always bromide of silver or a mixture of the bromide with other silver compounds, these chemicals being held in an emulsion of gelatine.
Those who are studying wholesomeness and digestibility, however, will avoid as far as possible the use of chemicals for raising, and fats of doubtful purity such as hog's lard.
Considerable difficulty seems to be experienced in many quarters in getting really good bread free from chemicals and other deleterious matters.
Modern surgery has been greatly facilitated by the employment of numerous anesthetics, chemicals which possess the power of inducing local or general insensibility.
Chemists had long recognized the fact that certain chemicals like preparations of zinc, fluorine, and phosphorus were phosphorescent.
They held a litter of apparatus, and there was the smell of chemicals in the air.
The fumes of the shattered bottle of chemicals were choking Alan.
We knew only that something terrible had happened; we could see only a blur with formless things in the void beneath our bars; and there were the choking fumes ofchemicals surging at us.
In the same way a white pearl, if placed near the fumes of ammonia, changes to a pinkish hue, while certain combinations of chemicals render them black, or 'smoked.
The things absorb certain moistures and chemicals from the air and sun, and shed those absorptions when kept in darkness or from the fresh air.
Even white thread may become "tender" from the chemicals used in bleaching it.
Fleet Street, where may also be procured Apparatus of every Description, and pure Chemicals for the practice of Photography in all its Branches.
Manufacturer of pure Chemicalsfor Photographic and other purposes.
Outbreaks occur with some regularity, however, and chemicals may be required to prevent defoliation.
Several chemicals have proven effective in preventing damage to ornamentals.
Various chemicals such as fumigants, contact poisons, and baits have been used to control the leaf-cutting ants with varying success.
Some chemicals which have a fumigating action have proved effective in controlling this insect in shade trees, but no practical control has yet been found for forest trees.
Try to get the blood flowing and flush the damned chemicals out of your brain.
It took a moment, but then I figured out the petri dishes and their chemicals had been placed in the incubators between 4:00 P.
Such chemicals are ordinarily included in solvents which dissolve ink, and some bleach out ink.
Having already enumerated the various processes--and the apparatus necessary for the manipulation, I will here give a list of the chemicals to be used, and then proceed to explain them more fully.
The apparatus and chemicals required, are an Iodine box--see fig.
The chemicals used in the ordinary lime and soda process of feed water treatment are common lime and soda.
Thus the chemicals used to preserve food impair its nutritive qualities; while other chemicals, as well as a number of ingenious mechanical processes, serve to facilitate adulteration.
They piled in fresh chemicals and started the electric current.
His hands trembled as he placed the chemicals on a shelf.
He is de only one dat knows how to mix de chemicals for de gas!
The use of chemicalsfor precipitating, deodorizing, and disinfecting.
It may help some woman who feels herself inexplicably impelled toward the male sex to know that she is not being "tempted by the devil" but merely driven by the insistent chemicals within her body.
Chemicals may not be so romantic as love, but neither are they so melodramatic!
In the wonderful internal laboratory of the body there are little glands whose business it is to secrete chemicals for just these emergencies.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "chemicals" in a variety of sentences. We hope that you will now be able to make sentences using this word.
