[url]https://en.wikipedia.org/wiki/The_Invisible_Man[/url]
[url]https://en.wikipedia.org/wiki/The_New_Accelerator[/url]

Though to be fair, 19th century sci-fi is damn OP if you try to adapt every stuff.
The Nautilus's technology and engine power is flatly impossible even in the modern world. Verne also made a freakin' transformer vehicle which can be both aircraft, ship and a submarine.
Then there's Wells' famous time machine or War of the Worlds.
So of course all things should be taken with a grain of salt and be kept without literally dominating the war.