Definitions
from The Century Dictionary.
- noun A compound of a metal or an electropositive radical with one combining unit of the radical of sulphuric acid, or that member of a series of sulphates which contains the smallest proportion of the sulphuric acid radical: as, protosulphate of iron or ferrous sulphate (FeSO4), commercially known as green vitriol.
Etymologies
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Examples
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The quantities are in each case calculated for one ounce, three parts of each of the following solutions being employed and added to one part of solution of protosulphate of iron.
Scientific American Supplement, No. 623, December 10, 1887 Various
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Bichromate prints can be made on albumenized paper by floating it on the solution, and by using a saturated solution of protosulphate of iron and a saturated solution of gallic acid.
Scientific American Supplement, No. 483, April 4, 1885 Various
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After printing, wash the prints in running water for twenty to thirty minutes, then float them face down on a weak solution (five to ten per cent.) of protosulphate of iron for five minutes, and wash as before.
Scientific American Supplement, No. 483, April 4, 1885 Various
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The finest blue is furnished by sesquinitrate of iron, but the salt almost exclusively employed is the protosulphate, the freedom of which from copper is essential to the colour of the blue.
Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field
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The _oxygen_ of the air, on the other hand, is highly paramagnetic, being, bulk for bulk, equivalent to a solution of protosulphate of iron, containing of the crystallised salt seventeen times the weight of the oxygen.
The World's Greatest Books — Volume 15 — Science Various 1909
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As an illustration, I shall take a well-known substance, common green copperas, or, as the chemists term it, protosulphate of iron.
The Stock-Feeder's Manual the chemistry of food in relation to the breeding and feeding of live stock Charles Alexander Cameron 1875
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MR. SISSON's developing fluid for collodion positives, the formula for which was published in the last Number of "N. & Q.," is merely a weak solution of the protonitrate and protosulphate of iron.
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Dissolve the protosulphate of iron in the water; then throw in the nitrate of lead in powder; stir with glass rod until it is dissolved; keep stirring while pouring in the acetic acid, and for a few minutes afterwards.
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Our observations respecting blowing on the glass apply equally when the protosulphate is used.
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It is this: 1½ drachms of protosulphate of iron in five ounces of water, 1 drachm of nitrate of lead, letting it settle for some hours; pour off the clear liquid, and then add to it 2 drachms of acetic acid.
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