Daltonic

1866, John Henry Pepper, The Playbook of Metals: A New Edition, page 150, All our ideas are so interwoven with the Daltonic theory that we cannot transform ourselves into the times when it did not exist.

1875 October 8, S. E. Phillips, The Atomic Weight of the Cerium Metals, William Crooke (editor), The Chemical News, Volume 31: 1875, page 176, It seems to me a cardinal point with many to consider the elements as blank units which may be played with numerically; they coldly and grudgingly accept the Daltonic proportions, and seem to consider it immaterial whether an element be xCl, or x₂Cl₂, or x₃Cl₃, excepting as far as volume or specific heat may determine.