By Howard Miller
Metal, glass dome, bakelite base
Combination barometer, thermometer, hygrometer under glass dome. German made. Used for determining weather on a ship.
Scroll through the images below for more detail.
Images from the Posner Collection.
Molika Ashford, “How do Sailboats Sail into the Wind,” Live Science, 2010.
“How Do Large Ships Deal with Massive Hurricanes,” Forbes, 2012.