Monthly Archives: June 2016

Sir Ferdinand von Mueller – Government Botanist

Sir Ferdinand von Mueller – Government Botanist

On June 30, 1825, German-Australian physician, geographer, and botanist Baron Sir Ferdinand Jacob Heinrich von Mueller was born. Von Mueller migrated to Australia in 1848 for health reasons, and there became the country’s greatest 19th-century scientist as a great botanical collector and writer. His contributions covered a wide field of…
Robert Ledley and the Computer Tomograph

Robert Ledley and the Computer Tomograph

On June 28, 1926, American computer scientist Robert Steven Ledley was born. Ledley pioneered the use of electronic digital computers in biology and medicine. He invented the ACTA (Automatic Computerized Transverse Axial) diagnostic X-ray scanner, the first whole-body computerized tomography (CT) machine, which revolutionized medical diagnosis. Conrad Roentgen‘s discovery of…
James Smithson’s Last Will

James Smithson’s Last Will

On June 27, 1829, English chemist and mineralogist James Smithson passed away, whose bequest of substantial funds in his will established the Smithsonian Institution, Washington, D.C., “for the increase and diffusion of knowledge”, despite having never visited the United States. James Smithson was educated at Pembroke College, Oxford and earned…
Mikhail Tsvet – the Father of Chromatography

Mikhail Tsvet – the Father of Chromatography

On June 26, 1919, Russian-Italian botanist Mikhail Semyonovich Tsvet passed away. Tsvet is credited with the invention of the adsorption chromatography, separating plant pigments by extracting them from leaves with ether and alcohol and percolating the solution through a column of calcium carbonate. Mikhail Tsvet was born 14 May 1872…
David Douglas and the Douglas Fir

David Douglas and the Douglas Fir

On June 25 1799, Scottish botanist David Douglas was born. Douglas was one of the most successful of the great 19th century plant collectors. Today, he is best known as the namesake of the Douglas fir. He worked as a gardener, and explored the Scottish Highlands, North America, and Hawaii, where he died.…
Oswald Veblen and modern Topology

Oswald Veblen and modern Topology

On June 24, 1880, American mathematician, geometer and topologist Oswald Veblen was born. Veblen‘s work found application in atomic physics and the theory of relativity. He proved the Jordan curve theorem in 1905 while this was long considered the first rigorous proof, many now also consider Jordan‘s original proof rigorous.…
Nicholas Shackleton and Paleoclimatology

Nicholas Shackleton and Paleoclimatology

On June 23, 1937, English geologist and paleoclimatologist Nicholas Shackleton was born. Shackleton was the son of the distinguished field geologist Robert Millner Shackleton and great-nephew of the explorer Ernest Shackleton. He helped identify carbon dioxide as a greenhouse gas and studied the ancient climate changes of the Quaternary period, the last…
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