Steam know-how necessary a number of developmental measures in order to contend with sail propulsion. Superior products and patterns were necessary to the boilers that ran at the higher pressures that permitted the improves in gasoline efficiency from, to start with, compound engines (efficiently used in SS Agamemnon (1865)) then https://folk-music-tradition08272.liberty-blog.com/33351505/5-simple-statements-about-maritime-history-explained