Meteorology known as the first "anemometer". In 1607, Galileo Galilei constructed a thermoscope. In 1611, Johannes Kepler wrote the first scientific treatise on snow crystals: "Strena Seu de Nive Sexangula (A New Year's Gift of Hexagonal Snow)". In 1643, Evangelista Torricelli invented the mercury barometer. In 1662, Sir Christopher Wren invented the mechanical, self-emptying, tipping bucket rain gauge. In 1714, Gabriel Fahrenheit created a reliable scale for measuring temperature with a mercury-type thermometer. In 1742, Anders Celsius, a Swedish astronomer, proposed the "centigrade" temperature scale, the predecessor of the current Celsius scale. In 1783, the first hair hygrometer was demonstrated by
Celsius (comics) "New 52" reboot Celsius first appeared in "Justice League" vol.2 #24, along with Negative Woman and Tempest being watched by Grid. Then in "Justice League" vol.2 #27 she is mentioned in a conversation by Scorch and Karma as being presumably killed off by Johnny Quick and Atomica. But in "Justice League" vol.2 #34 Lex Luthor tells The Chief that she and Tempest have faked their own deaths to escape from the Doom Patrol. In the "Watchmen" sequel "Doomsday Clock", Celsius was in India when a metahuman arms race in light of "The Superman Theory" and became the leader of The