SAY, HORACE. - THE INVENTION OF THE STEREOMETER (GAS PYCHNOMETER).

Description d'un Instrument propre à measurer le volume des corps, sans les plonger dans aucun liquide.

(Paris, Chez Fuchs, Guillaume, An VI (1797)). Without wrappers. In: "Annales de Chimie et de Physique, Par MM. Gay-Lussac et Arago." , tome 23, Cahier 1. Pp. 1-112 (entire issue offered). Say's paper: pp. 1-27 a. 1 folded plate depicting the stereometer.

First appearance of Say's description of his invention of the Gas Pychnometer, which he himself called Stereometer. It is a simple apparatus for determining the density and volume of solids without water. - Darmstaedter 1797 Say.

Order-nr.: 44128