Directions for preparing aerated medicinal waters by means of the improved glass machines made at Leith Glass-works.

Date:
1787
Catalogue details

Licence: Public Domain Mark

Credit: Directions for preparing aerated medicinal waters by means of the improved glass machines made at Leith Glass-works. Source: Wellcome Collection.

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    / ( « ) V. At the end of the fix hours, loofen and raife the top-plafs a little from the middle one, without taking them afunder, but fo far that the end of the crooked pipe be raifed a little above the water ; thus the water will run down from the top into the middle glafs, and fill it quite full as at firft, then fix the top-glafs again, and fhake the machine gently, in the fame manner as in Article IV, until the air begin to efcape into the upper glafs ; after which the ma- ^ « chine muft be left again at reft fix hours, and then the water let down again from the top-glafs into the middle one, as above direded* t This Ihaklng of the machine, and fubfe- quent reft, and letting down of the water from the top-piece into the middle one, is to be repeated every fix hours, or, if the water Is wanted fooner, every four hours, until the whole air is expelled from the chalk, which will require more effedlual fhaking and ftirring up of the chalk, in the end
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