Mr. Cooper tried protosulphate of iron, and also nitrate of silver, but could not during the experiment discover any prussic acid; but nevertheless, it is my opinion that she died from the effects of that poison.
This quantity of protosulphate requires for complete peroxidation just the quantity of oxygen liberated by 10 gr.
To a solution of sulphate of copper, 1 part, and protosulphate of iron, 3 parts, add a solution of iodide of potassium, and wash and dry the precipitate.
Chemically pure gold is obtained by dissolving the metal in nitro-hydrochloric acid, adding a solution of protosulphate of iron, and collecting and washing the precipitate.
From a solution of gold in aqua regia precipitated by protosulphate of iron, the resulting powder being washed, dried, and gently heated, This gives pure gold.
Ordinary phosphate of iron prepared by precipitating a solution of protosulphate of iron with another of phosphate of soda, the resulting powder being washed, and dried at a gentle heat.
The gold may be thrown down from its solution by adding a solution of protosulphate of iron; the precipitate, after being washed, dried, and gently heated, may be weighed as pure gold.
In this way a portion of pyrogallic acid is formed, which is very soluble in water, and strikes an intense bluish-black colour with the protosulphate or green sulphate of iron.
The water employed should be just previously boiled to expel oxygen; the protosulphate of iron should be entirely free from persulphate, and clear crystals of phosphate of soda should be chosen.
Precipitate a solution of protosulphate of iron with another of red prussiate of potash (ferricyanide of potassium.
When silk is steeped for some time in solution of protosulphate of iron, it abstracts the oxide, gets thereby dyed, and leaves the solution acidulous.
The same change occurs whenprotosulphate of iron is converted into persulphate, with the deposition of an insoluble peroxide in the substance of the stuff.
A developing solution, composed alone of an aqueous solution of protosulphate of iron and acetic acid, can be made to produce the finest effects possible to the process.
Sulphuric acid is then added to the mixture, the cork inserted, the tube heated, and the evolved vapors conducted into a solution of protosulphate of iron.
Some ammonia is next added to a solution of protosulphate of iron, the precipitate formed thoroughly washed, and exposed to the air until it acquires a greenish hue.
I prefer the use of the protosulphate to the protonitrate of iron from its cheapness, and the ease with which it is made up.
The solution I usually employ is prepared with protosulphate of iron.
The plate is then exposed and the latent image developed by an aqueous solution of pyrogallic acid, orprotosulphate of iron.
In 1844 Hunt introduced the protosulphate of iron as a developer.
The solution is acted on by protosulphate of iron, as already explained.
One pound oxalate potash, in papers ready for use, 60 cents, half pound protosulphate of iron, in papers, 10 cents .
These chemicals are, oxalate of potash and protosulphate of iron.
The same thing occurs with chromate of silver, some of the salts of mercury, argentine preparations combined with protosulphate of iron or gallic acid, and some other chemical combinations.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "protosulphate" in a variety of sentences. We hope that you will now be able to make sentences using this word.
