The 3/4-in. pipe extending down into the cooling tank, B,
should not enter into the water over 8 in. When filled with gas
the balloon is ready for a flight at the will of the operator.
** How to Clean a Clock [119]
It is very simple to clean a clock, which may sound rather absurd.
For an amateur it is not always necessary to take the clock to
pieces. With a little care and patience and using some benzine, a
clean white rag, a sable brush and some oil a clock can be cleaned
and put into first-class running order. The benzine should be
clean and free from oil. You can test benzine by putting a little
on the back of the hand; if it is good it will dry off, leaving
the hand quite clean, but if any grease remains on the hand, it is
not fit to use.
The oil should be of the very best that can be procured. Vegetable
oils should never be used. Clock oil can be procured from your
druggist or jeweler.
All loose dirt should be removed from the works by blowing with
bellows, or a fan, or dusting with a dry brush; in the latter case
great care should be exercised not to injure any of the parts.
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