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June 3rd, 1931 letter from B.A. Behrend to Nikola Tesla

June 3rd, 1931 letter from B.A. Behrend to Nikola Tesla

June 3rd, 1931
June 3, 1931 Mr. Nikola Tesla. Hotel Pennsylvania. New York City. Dear Mr. Tesla: Among those who...

Letter from Roentgen to Tesla thanking him for photos

July 20th, 1901 letter from Wilhelm Roentgen to Nikola Tesla

July 20th, 1901
Dear Sir! You have surprised me tremendously with the beautiful photographs of wonderful discharges...

June 8th, 1931 letter from Comfort A. Adams to Nikola Tesla

June 8th, 1931 letter from Comfort A. Adams to Nikola Tesla

June 8th, 1931
HARVARD UNIVERSITY THE HARVARD ENGINEERING SCHOOL Comfort A. Adams Pierce Hall Cambridge,...