 | 1882 - 642 páginas
...and appearance, the naked flame is applied to the bottom of the basins, cautiously and gradually. " If the original residue is white and powdery in appearance,...that is, so far, a good sign ; but if it is partly while and partly yellowish or greenish, a and especially if there are gumlike stains round the residue,... | |
 | Maria Parloa - 1906 - 436 páginas
..."Boil one quart of the water to be tested ration.0" ma porcelain dish, and then heat the dry residue hotter and hotter. If the original residue is white...greenish, and especially if there are gum-like stains around the residue, then, on heating these parts of the residue, we shall probably see them darken,... | |
 | Maria Parloa - 1906 - 448 páginas
..."Boil one quart of the water to be tested ration.0" ma porcelain dish, and then heat the dry residue hotter and hotter. If the original residue is white...greenish, and especially if there are gum-like stains around the residue, then, on heating these parts of the residue, we shall probably see them darken,... | |
 | Maria Parloa - 1906 - 440 páginas
...water: "Boil one quart of the water to be tested *na porcelain dish, and then heat the dry residue hotter and hotter. If the original residue is white...greenish, and especially if there are gum-like stains around the residue, then, on heating these parts of the residue, we shall probably see them darken,... | |
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Boil one quart of the water to be tested ration.0" ma porcelain dish, and then heat the dry residue hotter and hotter. If the original residue is white and powdery in appearance, that is, so far, a good sign; but if it is partly white and partly yellowish... 