Barometers Realm

This document is a commercial invoice issued by the French precision-instrument manufacturer L. Maxant, a well-established supplier of barometric, meteorological, and industrial measuring instruments in the mid-20th century. Dated 6 July 1949, the invoice records the sale of a barometric altimeter (Baromètre altimétrique n° 866 M, calibrated to 3000 meters), including packaging and postal charges, supplied to Maison Hertz in Roanne.

The letterhead prominently advertises L. Maxant’s broad production range—barometers, thermometers, hygrometers, anemometers, dynamometers, and industrial measuring devices—reflecting the company’s role as an approved supplier to French governmental and military institutions. Typographically, the document combines functional clarity with restrained decorative hierarchy typical of post-war French commercial printing. Beyond its transactional purpose, the invoice serves as valuable historical evidence of post-war scientific instrument commerce, pricing structures, distribution logistics, and professional networks between Parisian manufacturers and regional retailers. As an intact piece of commercial ephemera, it offers insight into the everyday material culture surrounding precision meteorological instruments in late-1940s France.