[A new apparatus for exact recording of the frequency of isolated frog heart by writing the ordinates].
D000818:Animals; D001001:Anura; D006321:Heart; D006801:Humans; D011898:Ranidae; D014956:Writing
HEART
Eine neue Apparatur zur exakten Registrierung der Frequenz des isolierten Froschherzens mittels Ordinatenschreibung.