54. From what has just been mentioned, it is essential that everything
about the person who is to do the work and the place in which the work
is to done should be clean. Clean dresses and aprons should be worn, and
the hands and finger nails should be scrupulously clean. The kitchen
floor should be scrubbed and the furniture dusted with a damp cloth. Any
unnecessary utensils and kitchen equipment should be put out of the way
and those required for canning assembled and made ready for the work.
The jars should be washed and the covers tested by fitting them on
without the rubbers. If a glass cover rocks, it does not fit correctly;
and if a screw cover will not screw down tight, it should be discarded.
Without the rubber, there should be just enough space between the cover
and the jar to permit the thumb nail to be inserted as is shown in Fig.
3. The edge of each jar and each glass cover should be carefully
examined every time it is used, so that none with pieces chipped off
will be used, as these will admit air. This examination is made by
running the finger over the edge of the jar and the cover, as is shown
in Fig.
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