Serum therapy : bacterial therapeutics and vaccines / by R. T. Hewlett.

Date:
1903
Catalogue details

Licence: In copyright

Credit: Serum therapy : bacterial therapeutics and vaccines / by R. T. Hewlett. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    tubule of the flask being connected to an exhaust pump, such as that figured, or to a water-pump. On a vacuum being created, the fluid passes through the filter-candle and col- lects in the filter-flask (c). In the illustration the pump is the Geryk pump, and the Wolf’s Fig. 12.—Filtration on Toxin. bottle (d) interposed between the flask and the pump contains strong sulphuric acid, and is for the purpose of preventing the passage of water or watery vapour into the pump. In the second method of filtration (fig. 12) the Berkefeld filter-candle is contained in the reservoir above the filter-flask, being fixed by