Jules Janssen

Pierre Jules César Janssen, a French astronomer, was born Feb. 22, 1824.  Janssen is often a test case in discussions of what constitutes a scientific discovery.  In August of 1868, Janssen  was observing an eclipse of the Sun, focusing his attention on the spectral...

Georg Andreas Böckler

Georg Andreas Böckler, a German engineer and garden architect, died Feb. 21, 1687, at about the age of 70; the year and date of his birth are unknown.  Indeed, most of the details of Böckler’s life are unknown.  We know only that he lived in Nuremberg, designed...

Eugène Farcot

Henri-Eugène-Adrien Farcot, a French clockmaker and balloonist, was born Feb. 20, 1830. In 1855, Farcot began producing beautiful conical pendulum clocks.  Ordinary pendulum clocks had been invented by Christiaan Huygens in 1656, and by ordinary, we mean that the...

Andrew Murray

Andrew Dickson Murray, a Scottish lawyer, entomologist, botanist, and would-be zoogeographer, was born Feb. 19, 1812.   Murray practiced law until he was forty and then began to study insects, publishing a few papers on the subject, and then he tried his hand at...

Francesco Redi

Francesco Redi, an Italian naturalist, was born Feb. 18, 1626. Redi was a physician at the Medici court in Florence and a member of the Accademia del Cimento, one of the world’s first scientific societies.  He is known for a set of experiments that he performed...