ON THE MOVEMENTS OF THE HEART UNDER THE RECEIVER OF AN AIR-PUMP

1849 The Lancet  
Previous experimenters had arrived at contradictory results. Caldani, Wernlein, and Kurschner, agree in the movement of the excised heart in vacuo, although the former of these allows that such movements are less lively and enduring than i in air. Fontana found that the heart soon ceased to move. The animals selected by the author were, the common frog, (rana esculenta) and the salamander, (salamander vulgaris.) The hearts of two equal-sized frogs, in a room at the temperature of 21io Reaumur,
more » ... e of 21io Reaumur, (about 800 Fahrenheit,) pulsated 40 and 41 times in the minute respectively. One was placed in the receiver, the other under a bell-glass of air; the latter continued these rhythmical contractions, which gradually became weaker and slower, ceasing in about an hour.
doi:10.1016/s0140-6736(02)89946-9 fatcat:x6l2udwzyrbkvbmauvby4hpnum