 | Industrial arts - 1805 - 536 pages
...detection of them requires a particular process upon it. A given weight of it, for instance four hundred grains, must be heated red for half an hour in a crucible,...fluid collected through the filter, and exposed for sown: days to the atmosphere in an open vessel. If any soluble quantity of sulphate of lime (gypsum)... | |
 | Repertory of arts, manufactures and agriculture - 1805 - 534 pages
...detection pf them requires a particular process upon it. A given weight of it, foe instance four hundred grains, must be heated red for half an hour in a crucible, mixed \yith one-third of powdered charcoal. The mixture must be boiled for a quarter of an hour, in a half... | |
 | Agriculture - 1806 - 416 pages
...When sulphate of lime is supposed to be contained in the soil, a given weight of it (as 4-00 grs.) must be heated red for half an hour in a crucible, mixed with a third of powdered charcoal, the mixture must be boiled for a quarter of an hour in half a pint of... | |
 | Friedrich Christian Accum - Chemistry - 1808 - 492 pages
...detection of them requires a particular process upon it. A given weight of it, for instance four hundred grains, must be heated red for half an hour in a crucible,...one-third of powdered charcoal. The mixture must be boiled lor a quarter of an hour in a half pint of water, and the : fluid collected through the filter, and... | |
 | Friedrich Christian Accum - Chemistry - 1814 - 484 pages
...detection of them requires a particular process upon it. A given weight of it, for instance four hundred grains, must be heated red for half an hour in a crucible,...some days to the atmosphere in an open vessel. If any soluble quantity of sulphate of lime (gypsum) existed in the soil, a white precipitate will gradually... | |
 | Sir Humphry Davy, George Sinclair, John Russell Duke of Bedford - Agricultural chemistry - 1815 - 452 pages
...detection of them requires a particular process upon it. A given weight of it, for instance four hundred grains, must be heated red for half an hour in a crucible,...mixture must be boiled for a quarter of an hour, in half a pint of water, and the fluid collected through the filtre, and exposed for some days to the... | |
 | Industrial arts - 1816 - 442 pages
...detection of them requires a particular process upon it. A given weight of it, for instance, four hundred grains, must be heated red for half an hour in a crucible,...pint of water, and the fluid collected through the filtre, and exposed for some. days to the atmosphere in an open vessel. If any notable quantity of... | |
 | Sir Humphry Davy - Agricultural chemistry - 1836 - 458 pages
...considered as principally saline matter ; the nature of which may be known by the tests described page 106. 9. Should sulphate or phosphate of lime be suspected...heated red for half an hour in a crucible, mixed with one third of powdered charcoal. The mixture must be boiled for a quarter of an hour, in a half pint... | |
 | John Towers (C.M.H.S.) - 1839 - 746 pages
...lime, by abstracting the oxygen from its sulphuric acid. A given weight of the entire soil (200 to 400 grains) must be heated red, for half an hour,...with one-third of powdered charcoal. The mixture must then be boiled for a quarter of an hour, in a half pint of water, and the fluid passed through a filtre,... | |
 | Agriculture - 1840 - 532 pages
...detection of them requires a particular process upon it. A given weight of it, for instance four hundred grains, must be heated red for half an hour in a crucible,...mixture must be boiled for a quarter of an hour, in half a pint of water, and the fluid collected through the filter, and exposed for some days to the... | |
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... and exposed for some days to the atmosphere in an open vessel. If any notable quantity of sulphate of lime (gypsum) existed in the soil, a white precipitate will gradually form in the fluid, and the weight of it will indicate the proportion. 
