 | 1805 - 534 Seiten
...will perhaps remain in the soil even after this operatidn, but it always affords useful comparative results ; and if a higher temperature were employed,...the process should be carefully noted, and when in four hundred grains of soil it reaches' as high as 60, the Soil may be considered as in the greatest... | |
 | Repertory of arts, manufactures and agriculture - 1805 - 534 Seiten
...p'erbap's rethain in the soil 'even Wter this operation, but it always" affords pjeful comparative results ; and if a higher temperature were employed, the vegetable or animal mutter would undergo decomposition, and in consequence the experiment ba wholly unsatisfactory. ...,-.;... | |
 | Friedrich Christian Accum - 1808 - 492 Seiten
...will perhaps remain in the soil even after this operation, but it always affords useful comparative results ; and if a higher temperature were employed,...the process should be carefully noted ; and when in four hundred grains of soil it reaches • In several experiments, in which this process has been carried... | |
 | Friedrich Christian Accum - 1814 - 484 Seiten
...will perhaps remain in the soil even after this operation, but it always affords useful comparative results ; and if a higher temperature were employed,...unsatisfactory. The loss of weight in the process should be carefullynoted ; and when in four hundred grains of soil it reaches • In several experiments, in... | |
 | 1814 - 760 Seiten
...the heat is not too high ; but when the wood begins to be charred, the process must be stopped.' ' The loss of weight in the process should be carefully noted, and when in 100 grains of soil it reaches as high as 50, the soil may be considered as in the greatest degree absorbent,... | |
 | Sir Humphry Davy, George Sinclair, John Russell Duke of Bedford - 1815 - 452 Seiten
...will perhaps remain in the soil even after this operation, but it always affords useful comparative results ; and if a higher temperature were employed,...the process should be carefully noted, and when in four hundred grains of soil it reaches as high as 50, the soil may be considered as in the greatest... | |
 | William Thomas Brande - 1821 - 806 Seiten
...will perhaps remain in the soil even after this operation, but it always affords useful comparative results ; and if a higher temperature were employed,...vegetable or animal matter would undergo decomposition, ami, in consequence, the experiment bo wholly unsatisfactory. " The loss of weight in the process should... | |
 | John Towers (C.M.H.S.) - 1839 - 746 Seiten
...retention is thus ascertained; and on this subject Davy observed, — " The loss of weight in this process should be carefully noted; and when in 400 grains of soil it reaches fifty grains, the soil may be considered as in the greatest degree absorbent, and retentive of water,... | |
 | 1840 - 532 Seiten
...will, perhaps, remain in the soil even after this operation, but it always affords useful comparative results; and if a higher temperature were employed,...consequence the experiment be wholly unsatisfactory. 2. None of the loose stones, gravel, or large vegetable fibres, should be divided from the pure soil... | |
 | Cuthbert William Johnson - 1842 - 1364 Seiten
...will perhaps remain in the soil even after this operation, but it always affords useful comparative results; and if a higher temperature were employed,...should be carefully noted, and when in 400 grains of sou it reaches as high as 50°, the soil may be considered as in the greatest degree ab97 eorbent,... | |
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... the bottom of the dish ; as long as the colour of the wood remains unaltered the heat is not too high, but when the wood begins to be charred the process must be stopped. A small quantity of water will perhaps remain in the soil, even after this operation,... 