Fig. 184.
A small pipe admits air to the steam jet, and by mixing therewith prevents a collapse of the steam bubbles, and the noise, which is such a great objection to heating by direct steam in the old way. A valve or cock on the small air pipe regulates the opening as may appear most desirable.
Exhaust steam can by the same method be disposed of under water without noise.
ACCIDENTS AND EMERGENCIES.
Few subjects can more usefully employ the attention and study of engineers than the proper treatment and first remedies made necessary by the peculiar and distressing accidents to which persons are liable who are employed in or around a steam plant.
These and many other things of a like nature are likely to call for a cool head, a steady hand and some practical knowledge of what is to be done.
Fig. 185.