Foundations of the molecular theory

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. Mém. 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]