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Democritus, 1628. Creator: Hendrick ter BrugghenDemocritus, 1628
Daltons table of atomic symbols, 1835. A table of atomic symbols from a lecture delivered by the English chemist John Dalton (1766-1844) at the Manchester Mechanics Institution, 19 October 1835
Democritus, (c460-370 BC), 1830. Creator: UnknownDemocritus, (c460-370 BC), 1830. Democritus (c460-370 BC) Ancient Greek pre-Socratic philosopher remembered for his formulation of atomic theory of the universe
Jons Jakob Berzelius, Swedish chemist, 1830s. Berzelius (1779-1848) introduced modern chemical symbols. He discovered the elements selenium, thorium and cerium, and was first to isolate others
John Dalton, English chemist, c1834 (1902). As a Quaker, Dalton (1766-1844) could not attend an English university, so supported himself by teaching
John Dalton, British chemist, 19th century. Artist: CH JeensJohn Dalton, British chemist, 19th century. Dalton (1766-1844) was born near Cockermouth, Cumbria. In 1794 he described colour blindness (Daltonism) from which both he and his brother suffered
John Dalton, English chemist, c1860. Dalton (1766-1844) was born near Cockermouth, Cumbria. In 1794 he described colour blindness (Daltonism) from which both he and his brother suffered
John Dalton, English chemist, 1881. Dalton (1766-1844) was born near Cockermouth, Cumbria. In 1794 he described colour blindness (Daltonism) from which both he and his brother suffered
Jons Jacob Berezelius, Swedish chemist, c1890. Berzelius (1779-1848) introduced modern chemical symbols. He discovered the elements selenium, thorium and cerium, and was first to isolate others
Jons Jacob Berzelius, Swedish chemist, early 19th century. Berzelius devised the first consistently accurate method of using the oxidation technique developed by Joseph Louis Gay-Lussac