We did not start to write
about explosions. That is just what we don't want to have anything to
do with. But, you say, is there no danger of a boiler exploding? Yes.
But if you wish to explode your boiler you must treat it very
differently from the way we advise. We have just stated, that as long
as you have plenty of water, and know you have, there is no danger.
Well, how are you to know? This is not a difficult thing to know,
provided your boiler is fitted with the proper appliances, and all
builders of any prominence, at this date, fit their boilers with from
two to four try-cocks, and a glass gauge. The boiler is tapped in from
two to four places for the try-cocks, the location of the cocks ranging
from a line on a level with the crown sheet, or top of fire box, to
eight inches above, depending somewhat on the amount of water space
above the crown sheet, as this space differs very materially in
different makes of the same sized boiler. The boiler is also tapped on
or near the level of crown sheet, to receive the lower water glass cock
and directly above this, for the top cock.
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