ults with the normal nitric, and acetic acids gave identical results. Only very strong acids had less effect than dilute ones, which volume of sound and current at the transmitting end BY J. J. HUMMEL AND H. R. PROCTER. again have less action than pure water. Similar results In applying basic coal… … in a tepid bath (45°C.) containing the requisite quan- concentrated acid than lime-soda glass of equivalent composition. The action of pure sulphuric acid is less tity of tartar emetic for 144-4 hour, then to wash, strong than that of boiling water, but at very elevated before proceeding to the…
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