Steamboat-Inspection 1908
General rules and regulations prescribed by the Board of supervising inspectors .. 1908
by United States. Steamboat-Inspection Service
Some more history.
https://archive.org/details/generalr...steam+whistles
General rules and regulations prescribed by the Board of supervising inspectors .. 1908
by United States. Steamboat-Inspection Service
Some more history.
https://archive.org/details/generalr...steam+whistles