Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 158
ty. On the other hand, with a cleaneven fire, if we open the damper a bit, the draft gage reading in-creases because more air is flowing and the amount of increasetells us about how much more air is flowing. If the damper isclosed a bit, less air flows and the reading of the gage falls off.One… … -purnoceJDraft JDraft Through
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-401-252.webp)
