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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,doi:10.1016/s0140-6736(02)89946-9 fatcat:x6l2udwzyrbkvbmauvby4hpnum