A friend had this old barometer lying around that I snatched up immediately!
It features a thermometer with mercury filling, temperature in Fahrenheit and Centigrade and a barometer going from 28 to 32 in something units.
My grandparents had one of these growing up, I remember using it to figure out the conversion equation from F to C degrees. As well as my Pop staring at it intently, tapping on the display to try and figure out how the weather was fairing.