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Ernst Mach

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:800.00 - 1,000.00 USD
Ernst Mach

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Auction Date:2019 Aug 07 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, 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
Austrian physicist and philosopher (1838–1916) who, as a result of his research into the effects of supersonic velocity, lent his name to the ratio of the speed of a projectile to the speed of sound, aka the Mach number. Though Einstein would later credit him as the forerunner of the Theory of Relativity, Mach ultimately rejected Einstein's theory. ALS in German, signed “E. Mach,” one page on a 5.5 x 3.5 postcard, July 20, 1897. Untranslated letter to R. Innker in Vienna. In fine condition, with two file holes to the top.