 ... which are insoluble in water and in many acids, and are thus conveniently separated from a great many other bodies. Now, when in a water holding iron-oxide, sulphates are also present, the action of organic matter, deoxidizing the latter, furnishes...  Report of Progress ... - Σελίδα 1371876Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | American Philosophical Society - 1874 - 758 σελίδες
...air on soluble sulphate of lime and magnesia, giving rise, -if carbonic acid be present, to Hydrogen Sulphide -which "in some conditions not well understood...contains two equivalents of sulphur to one of iron." He adds that he has observed that the ferrous sulphide or proto-sulphide of iron in presence of a per-silt... | |
 | American Institute of Mining Engineers - 1873 - 524 σελίδες
...organic matter, deoxidizing the latter, furnishes the reagent necessary to convert the iron into a sulphide; which in some conditions, not well understood, contains two equivalents of sulphur for one of iron, and constitutes iron-pyrites. I may here say that I have found that the unstable protosulphide,... | |
 | 1874 - 612 σελίδες
...organic matter, deoxidizing the latter, furnishes the reagent necessary to convert the iron into a sulphide; which in some conditions, not well understood, contains two equivalents of sulphur for one of iron, and constitutes iron-pyrites. I may here say that I Iwve found that the unstable protosulphide,... | |
 | Thomas Sterry Hunt - 1875 - 524 σελίδες
...organic matter, deoxidizing the latter, furnishes the reagent necessary to convert the iron into a sulphide ; which in some conditions, not well understood, contains two equivalents of sulphur for one of iron, and constitutes iron-pyrites. I may here say that I have found that the unstable protosulphide,... | |
 | Thomas Sterry Hunt - 1875 - 530 σελίδες
...organic matter, deoxidizing the latter, furnishes the reagent necessary to convert the iron into a sulphide ; which in some conditions, not well understood, contains two equivalents of sulphur for one of iron, and constitutes iron-pyrites. I may here 'say that I have found that the unstable... | |
 | American Philosophical Society - 1876 - 742 σελίδες
...air on soluble sulphate of lime and magnesia, giving rise, if carbonic acid be preseat, to Hydrogen Sulphide which "in some conditions not well understood contains two equivalents of sulphur to one of iroo." He adds that he has observed that the ferrous sulphide or proto-sulphide of iron ia presence... | |
 | Kentucky. Geological Survey, 1873-1891 - 1877 - 610 σελίδες
...organic matter, deoxidizing the latter, furnishes the reagent necessary to convert the iron into a sulphide; which in some conditions, not well understood, contains two equivalents of sulphur for one of iron, and constitutes ironpyrites. I may here say that I have found that the unstable protosulphide,... | |
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