He seems to have invented the first wind pressure gauge, as an aid to seamen, and he improved the bathometer, hygrometer, hydrometer, and barometer, as well as instruments not directly involved in measurement such as the vacuum pump and sea-water sampling devices.
"The Introduction of Self-Registering Meteorological Instruments"
Robert P. Multhauf
Bless my hydrometer, I should say so!"
"Tom Swift and his Undersea Search or, The Treasure on the Floor of the Atlantic"
Victor Appleton
"Bless my hydrometer, but he's got nerve for a first trip in a submarine!
"Tom Swift and his Undersea Search or, The Treasure on the Floor of the Atlantic"
Victor Appleton