RULES AND REGULATIONS FOR FREEBOARD. 151 
the chamber, and you can take away through the by-pass a large proportion; our experi- 
ments show from about 80 to go per cent. 
For a fluctuation load we believe that this burner has a very useful field, and we 
will be able to cover wide ranges with a few large unit burners. I may add that the 
work referred to here in the Navy Department seems to me to be the only marked ad- 
vance in oil burning. We have seen some very large vessels fitted up for oil, but they 
are following along the precedent of some years back, and there is still a large field in 
which good economy with higher capacity may be obtained with oil. 
