French scientist and bacteriologist whose studies on fermentation led to the conclusion that it was caused by bacteria, proving the germ theory of disease; he also developed a successful vaccine for rabies, which hitherto had been universally fatal. ALS in French, signed 'L. Pasteur,' one page, 5.25 x 8, April 12, 1854. Letter to Mr. Derenesmesil. In part, 'On Monday, Mr. Dumas sent you the summary of the report of the commission. Is it ready yet? I would very much like to obtain two copies as soon as possible. I will be away for a few days and would like to bring one copy to Mr. Thies.' In fine condition, with pencil notation to top edge. COA John Reznikoff/University Archives and RRAuction COA.
