A small plant has been put in action at the gas works in Kilkenny and
another on a larger scale, and differing somewhat in detail, here in
Glasgow at the Alum and Ammonia Company's works, where the liquor from
the Tradeston Gas Works is converted. The trials on a working scale
have only been made at both places within the past ten days; and, so
far, nothing has appeared against the principle, though in certain of
the details of construction some alterations are being made to improve
it. The extra yield of salt from a given quantity of acid obtained in
the experiments has been proved in practice, as also the absorption of
the sulphureted hydrogen.

The other day, while ammoniacal liquor of about 9 oz. strength was
being run at the rate of 70 gallons per hour through the still, 5 feet
in diameter and 10 feet high, containing seventeen trays, no smell of
sulphureted hydrogen was perceptible from the waste gases from the
saturator, although on applying lead paper a slight trace of this
impurity was noticeable, and it may be stated that the gases were
being delivered at the ground level, where there was no difficulty in
testing them.

In the Glasgow apparatus we have found it advisable to enlarge the
pipe leading the gases into the saturator, as the volume of these is
much greater than would be the case in the ordinary method of working.
Further experience will probably indicate the desirability of
increasing the height of the still, which, being only 10 feet, is not
more than half the height that Coffey stills are ordinarily made.

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