F. H. Storer—Schenbein’s Test for Nitrates. 181 
acetic acid while the other was boiled with cadmium for five 
‘minutes and thereafter distilled with acetic acid, pains being 
taken to make the two experiments alike in all other respects, 
The first 50 c.c. of distillate were collected in each instance and 
tillate was subjected to the test in each instance. In both 
trials the portions tested directly gave a stronger coloration 
than was obtained in either of the distillates. In order to be 
sure that the acetic acid had no improper influence on these 
though the mixtures were allowed to stand twenty-four hours 
after the application of the test. 
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Genaty Step, before the acidulation of the liquor or the ad- 
m OF the lodo-starch, is decidedly preferable to the other 
* Poggendorff’s len, 1862, cxv, 128. 
Ax.Joun, Scr, hae Serres—Vou, XII, No. 69.—Sert., 1876, 
