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
Władysław Anders Władysław Anders Władysław Albert Anders (11 August 1892 – 12 May 1970) was a general in the Polish Army and later in life a politician and prominent member of the Polish government-in-exile in London. Anders was born on 11 August 1892 to his father Albert Anders and mother Elizabeth (maiden name Tauchert) in the village of Krośniewice–Błonie, sixty miles west of Warsaw, in what was then a part of the Russian Empire. At the time of his birth Poland did not exist as an independent state, as a result of the Partitions of Poland at the end of the eighteenth