Media Contributed by Rick

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RickStudent, Philosopher, Writer, Developer
logo for Presidency University, Kolkata —
Photo Credit: By Source, Fair use, https://en.wikipedia.org/w/index.php?curid=60292496
logo for Presidency University, Kolkata
Sketch by Colesworthey Grant - Lithographic sketches of the public characters of Calcutta,
D. L. Richardson sketch — Sketch by Colesworthey Grant - Lithographic sketches of the public characters of Calcutta,
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=59518032
D. L. Richardson sketch Sketch by Colesworthey Grant - Lithographic sketches of the public characters of Calcutta,
Invented by Christiaan Huygens in 1656
The first pendulum clock — Invented by Christiaan Huygens in 1656
Photo Credit: Ernst Gerland and Friedrich Traumüller (1899) Geschichte der physikalischen Experimentierkunst, Wilhelm Engelmann, Leipzig, Germany, p.182, fig.182 on Google Books, Public Domain, https://commons.wikimedia.org/w/index.php?curid=11723177
The first pendulum clock Invented by Christiaan Huygens in 1656
Horologium oscillatorium sive de motu pendulorum, cover 1673 —
Photo Credit: By Huygens, Christiaan - Public Domain, https://commons.wikimedia.org/w/index.php?curid=39723046
Horologium oscillatorium sive de motu pendulorum, cover 1673
Christiaan Huygens —
Photo Credit: By Unknown - Popular Science Monthly Volume 28, Public Domain, https://commons.wikimedia.org/w/index.php?curid=11461596
Christiaan Huygens
Su Song’s hydro-mechanical clock tower —
Photo Credit: https://www.sciencefocus.com/future-technology/made-in-ancient-china-amazing-inventions-from-the-far-east/
Su Song’s hydro-mechanical clock tower
Su Song —
Photo Credit: By 不詳 - Public Domain, https://commons.wikimedia.org/w/index.php?curid=37867297
Su Song
Yi Xing writing the Da Yan calendar —
Photo Credit: http://hua.umf.maine.edu/China/astronomy/tianpage/0015H_YiXing_9275_man683727bw.html
Yi Xing writing the Da Yan calendar
Yi Xing's Da Yan calendar —
Photo Credit: http://hua.umf.maine.edu/China/astronomy/tianpage/0015H_YiXing_9275_man683727bw.html
Yi Xing's Da Yan calendar
Yi Xing bust —
Photo Credit: Por Hans A. Rosbach - Obra do próprio, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7469979
Yi Xing bust
Plato's Alarm Clock —
Photo Credit: http://unfashionablehumanbody.blogspot.com/2009/06/platos-alarm-clock.html
Plato's Alarm Clock
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