In the
apparatus described, the trays were placed on top of the
hot plate, and it was shown that instruments laid flat in
them could easily be sterilized. This form of apparatus is
particularly suitable for those who wish to provide heat
at a precise temperature or to sterilize a small number of
instruments or syringes. To save time it was found that
it was better to set the aluminium hot plate at a standard
temperature (190°C.) and maintain it continuously. In the
machine described it was found that a syringe in its container
could be sterilized in 22 minutes. Since then, further
experiments have shown that the container need not fit
the bore holes accurately, and will be adequately sterilized
in the same time.