Anders Celsius magnitude (a measure of brightness) of certain stars. This was the first attempt to measure the intensity of starlight with a tool other than the human eye. He made observations of eclipses and various astronomical objects and published catalogues of carefully determined magnitudes for some 300 stars using his own photometric system (mean error=0.4 mag). Celsius was the first to perform and publish careful experiments aiming at the definition of an international temperature scale on scientific grounds. In his Swedish paper "Observations of two persistent degrees on a thermometer" he reports on experiments to check that the freezing point is
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