by the base is effected. at 53d street; and here also is used the new switch appar- Vinegars are sometimes adulterated with sulphuric and atus, which forms the third and last portion of our subject. other mineral acids, which may be detected as follows: The Fig. 5 shows the interior of the switch… … It is then cooled, diluted, and a few drops of iodine tincture placed and locked, nor can the latter be altered after the sig- dropped in. With pure vinegar, the blue color of iodide of nal is set. Any combination of interlocking is possible: in starch should show itself; if no coloration ensues, a…
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