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" ... transferred to an evaporating dish, preferably of platinum for the sake of celerity in evaporation, moistened with enough water to prevent lumping, and 5 to 10 cc of strong HC1 added and digested with the aid of gentle heat and agitation until solution... "
Bulletin of the United States Geological Survey - Seite 189
von Geological Survey (U.S.) - 1907
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Bulletin, Ausgaben 303-308

1907 - 874 Seiten
...procedure is here given in brief, that covers the important constituents of limestones. The operations arc generally given without explanations. Those who seek...200° for an hour or less. 46. SILICA. The residue ts treated with 5 to 10 cm.3 of strong hydrochloric acid, which is then diluted to half strength, or...
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A Treatise on Concrete, Plain and Reinforced: Materials, Construction, and ...

Frederick Winslow Taylor, Sanford Eleazer Thompson - 1905 - 642 Seiten
...with the aid of gentle heat and agitation, until solution is completed. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the steam bath. Silica: The residue, without further heating, is...
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Practical Cement Testing

W. Purves Taylor - 1905 - 348 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. Silica ( SiO<). The residue without further heating is...
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A Hand-book for Cement Users

Charles Carroll Brown - 1905 - 440 Seiten
...with the aid of gentle heat and agitation, until solution is completed. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. Silica. — The residue, without further heating, is treated...
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Practical Cement Testing

W. Purves Taylor - 1908 - 348 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. Silica (SiO8). The residue without further heating is treated...
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Standard Methods of Testing and Specifications for Cement

Portland Cement Association, Chicago - 1909 - 36 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The Solution is then evaporated to dryness, as far as this may be possible on the bath. SILICA (SiO2). The residue without further heating is treated...
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Dust Preventives and Road Binders

Prévost Hubbard - 1910 - 440 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. SILICA (SiO2). The residue without further heating is treated...
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Manual of the American Railway Engineering Association

American Railway Engineering Association - 1911 - 520 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.° The solution is then evaporated to dryness, as far as this may be possible on the bath. • If anything remains undecomposed it should be separated,...
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A Treatise on Cement Specifications: Including the General Use, Purchase ...

Jerome Cochran - 1912 - 150 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. * If anything remains undecomposed it should be separated,...
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A Manual of Cement Testing: For the Use of Engineers and Chemists in ...

William Allyn Richards, Henry Briggs North - 1912 - 198 Seiten
...with the aid of gentle heat and agitation until solution is complete. Solution may be aided by light pressure with the flattened end of a glass rod.* The solution is then evaporated to dryness, as far as this may be possible on the bath. SILICA (SiO2). The residue without further heating is treated...
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