Skip to main content
Go to accessibility notice

    Description

    Louis Joseph Proust. Autograph Letter Signed.
    "Proust." One page, in French, 6.75" x 8.25", n.d [circa 1806-1808]; n.p. [Paris?] In this letter addressed to Louis Augustin Guillaume Bosc (1759-1828), a French botanist, invertebrate zoologist, and entomologist, Proust asks him if letters from province [?] are being held by the postal service. Proust is concerned that a letter he wrote to Berthollet 15 days prior may have been lost; the letter would be of interest to the Commission on Grape Sugar. Adds that all are well and that his wife gives her warm regards to his entire family. Proust's reference to Claude Louis Berthollet (1748-1822), the French chemist known for his scientific contributions to theory of chemical equilibria via the mechanism of reverse chemical reactions, and for his contribution to modern chemical nomenclature, may relate to their longstanding professional disagreement (1803-1808) concerning the stability of the proportions of components in a given compound. Proust was eventually proven right. The letter also refers to a recent trip to Spain, where Proust extracted a specific sugar from grapes. When he returned to France in 1806 Napoleon offered him a large amount of capital to build a factory that would produce this sugar. Proust refused.

    Louis Joseph Proust (1754-1826) was a French chemist best known for his discovery of the law of constant composition in 1794, stating that chemical compounds always combine in constant proportions.

    Letter is accompanied by a handwritten French transcription and a printout of an English translation.

    Condition: Except for the usual folds and a slight tear on the left hand side, the letter is in good condition.


    Auction Info

    Bidding Begins Approx.
    August
    16th Friday
    Auction Dates
    September
    4th Wednesday
    Proxy Bidding Begins Approx.
    51 Days
    Bids + Registered Phone Bidders: N/A
    Lot Tracking Activity: N/A
    Page Views: 27
    Auction Type
    Grand Format:  Heritage Live®:After Internet bidding closes, live bidding will take place through www.HA.com/Live. Your secret maximum bid placed prior to the live event will compete against the live bids. To maximize your chances of winning, enter realistic secret maximum bids on our site. Many of our proxy bidders are successful at winning lots in these auctions, and usually below their secret maximum. You can also place last minute bids directly with us by e-mailing Bid@HA.com or calling 1-866-835-3243. (Important note: Due to software and Internet latency, live bids may not register in time, so enter realistic proxy bids.)

    Grand Format Floor Sessions
    Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live starts 24 hours before the live session begins and continues through the session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.

    Track Item