27

        The following experiments—XI and XII—were made to determine whether the
simple process above described would disinfect the large room of 1,640 cubic feet
capacity described on pages 11 et seq., containing burrows, so dispensing with
the fan and complicated arrangements of generator and tubes. It will be seen
that the burrows were not penetrated even with the 1 oz. of KCN to 100 cubic
feet used in Experiment XII.

Experiment XI.

        Eight ozs. of potassium cyanide (Burgoyne Burbidges' Double salt 100
per cent.) 16 ozs. of sulphuric acid specific gravity 1.83 and 32 ozs. of water
were mixed—a proportion of about ½ oz. to 100 cubic feet.

        The exposure was for 50 minutes. Fifteen minutes later the room was
entered and was examined at once on opening the godown and also three hours
later.