title: THE H-ION CONCENTRATION AND THE ORIGIN OF THE HEART BEAT.
abstract: The rate of the frog or guinea pig heart preparation was not significantly influenced by the H-ion concentration when this was kept within limits which allowed the heart to continue beating. The theory that the H-ion concentration is intimately concerned with the origination of the heart beat is not supported by the results of this investigation.
authors.forename: C R
authors.initials: CR
authors.lastname: Spealman