TLS signed "Charles A. Lindbergh," one page, 8.5 x 10.75, April 5, 1940. Letter to Dr. Albert Ebeling at Lederle Laboratories, in part: "I am sending under separate cover two books which you loaned to me several years ago. They were misplaced with our own books at the time we sailed for Europe in 1935, and I have just located them. I apologize for this long delay and hope that it has not caused you inconvenience. I just had a letter from Dr. Carrel which indicates that he may be coming over here in the near future. I suppose that his trip depends upon developments in France. I had hoped to so be able to see you at Pearl River before this, but I have been unable to find time for the trip. If Dr. Carrel comes over, I hope we can all meet in New York, or possibly at your laboratories at Lederle." In fine condition, with a thin strip of adhesive residue along the back top edge. Accompanied by the original mailing envelope.
When his sister-in-law Elisabeth Morrow was discovered to have rheumatic heart disease in 1929, Lindbergh began a quiet collaboration with Nobel Prize-winning scientist Alexis Carrel on the development of a heart-bypass pump designed to enable open-heart surgery. The result, a perfusion pump, was a hand-blown, 18-inch-high, clear Pyrex glass configuration devised to keep organs functioning outside of the body. The pump itself became an object of wonder even in the absence of its creators, and proved a popular exhibit at the 1939 World’s Fair in New York City, where a perfusion of a canine thyroid drew large crowds. Although Morrow sadly passed away in 1934, a year before the pump was completed, its creation served as a precursor to medical devices like the heart-lung machine, in addition to helping develop a practicable method for stopping the heart during surgical procedures.
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