Journal, ecu. 77. Removal of Ink-stains. a Pyrophosphate of soda slowly dissolves ink-stains, and can be used for materials too tender to support the action of oxalic acid, bleaching ... The narrowing at s s1 is produced by means of a string or wire tied round the tube. ... In two experiments 20 88 and 20-94 per cent, oxygen were thus removed from ordinary atmospheric air contained in a tube. These figures accord wonderfully well with the results of the most rigorous scientific methods.
Title | : | Practical Magazine |
Author | : | |
Publisher | : | - 1873 |
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