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Michael Faraday

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:4,500.00 - 5,500.00 USD
Michael Faraday

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Auction Date:2018 Jun 13 @ 18:00 (UTC-5 : EST/CDT)
Location:236 Commercial St., Suite 100, Boston, Massachusetts, 02109, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
ALS signed “M. Faraday,” one page, 4.25 x 7, blindstamped Royal Institution of Great Britain letterhead, September 26, 1857. Letter to C. C. Maxwell on Galileo's famous Leaning Tower of Pisa experiment, in which he is said to have dropped two spheres of different masses from the top of the tower to demonstrate that their time of descent was independent of their mass. In full: "There will be a difference in the time of the fall of the divided & the undivided body it will in most cases be quite invisible as in Galileo's expt but if the fall is through a resisting medium there will be a difference with difference of size. Take a sphere of gold it falls with a certain velocity through air or through water—divide it into dust & it will fall far more slowly as the particles, or pieces are larger the difference will be less & soon become invisible but philosophically it must exist." In fine condition.

Galielo's famous experiment disproved Aristotle's theory of gravity (which said that heavy objects fall faster than lighter ones) and it remains one of the most well-known demonstrations in history. The results helped to usher in the era of modern science. As one of the most revered scientists of the 19th century, Faraday was familiar with Galileo's great experiment and his thoughts on the subject are truly spectacular. He observes that the results hold true only when there is no resistance—ideally, the demonstration would take place in a vacuum. This experiment was famously recreated on the surface of the moon in 1971 by astronaut Dave Scott, dropping a hammer and feather at the same time—given the lack of air resistance, they indeed landed simultaneously. An amazing letter connecting science across the ages.