Cont: Dalton, J. Extracts from A new system of chemical philosophy, pt. I, 1808 -- Gay-Lussac, J. L. Memoir on the combination of gaseous substances with each other. [Soc. d ́Arcueil. M©♭m. de phys., t. 2, 1809] -- Dalton, J. Extract from A new system of chemical philosophy, pt. II, 1810 -- Avogadro, A. Essay on a manner of determining the relative masses of the elementary molecules of bodies and the proportions in which they enter into these compounds. [Jour. de phys., v. 73, 1811] Note: "The papers here reprinted in chronological order serve to exhibit the historical development of the idea of a connection existing between the number of particles in different gases and the volume they occupy."--Pref.

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