Editing John Ericsson (section)

==Later designs==
Later Ericsson designed other naval vessels and weapons, including a type of [[torpedo]] and a [[destroyer]], a [[torpedo boat]] that could fire a cannon from an underwater port. He also provided some technical support for [[John Philip Holland]] in his early submarine experiments. In the book ''Contributions to the Centennial Exhibition'' (1877, reprinted 1976) he presented his "sun engines", which collected solar heat for a [[hot air engine]]. One of these designs earned Ericsson additional income after being converted to work as a methane gas engine.