The pipe, d, connecting the two parts of
the apparatus forks so as to lead the gas from one or the other of the
generators, whence it passes into the copper washer within the base,
then into the glass indicating washer, and then to the pump which forces
it into the saturator.
Each of the generators communicates by special pipes, a, with a single
safety vessel, V, that operates the same as in the preceding apparatus.
The agitator, Q, is of bronze, and is curved as shown in Fig. 11.
The production of this type of apparatus is dependent upon the number of
siphons that can be filled by a siphon filler working without
interruption.--_Machines, Outils et Appareils._
* * * * *
DETECTION AND ESTIMATION OF FUSEL OIL.
Until quite recently we have had no accurate method for the
determination of fusel oil in alcohol or brandy. In 1837 Meurer
suggested a solution of one part of silver nitrate in nine parts of
water as a reagent for its detection, stating that when added to alcohol
containing fusel oil, a reddish brown color is produced, and in case
large quantities are present, a dark brown precipitate is formed. It was
soon found, however, that other substances than amyl alcohol produce
brown colored solutions with silver nitrate; and Bouvier[1] observed
that on adding potassium iodide to alcohol containing fusel oil, the
solution is colored yellow, from the decomposition of the iodide.
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