American journal of physiology . logic, 1882, ii, pp. 291-302, and Sertoli: Archives itahennes de biologie,1883, iii, pp. 78-94; for non-mammalian, Morgen : Untersuchungen aus derphysiologischen Institut der Universitat Halle (Bernsteins), 1S90, ii, pp. 139-169,SCHULTZ: Archiv fur Physiologie, 1897, pp. 1-28, and Winkler: Archiv fiir diegesammte Physiologie, 1898, Ixxi, pp. 357-398. - The latent period at 10° C. is seconds; at 15° C, ; at 20 C, ; at25° C, ; at 30° C, ; at 35° C, ; at 38° C, ; at 40° C, , from theaverages of a number of determinations. Mammalian Smoot
American journal of physiology . logic, 1882, ii, pp. 291-302, and Sertoli: Archives itahennes de biologie,1883, iii, pp. 78-94; for non-mammalian, Morgen : Untersuchungen aus derphysiologischen Institut der Universitat Halle (Bernsteins), 1S90, ii, pp. 139-169,SCHULTZ: Archiv fur Physiologie, 1897, pp. 1-28, and Winkler: Archiv fiir diegesammte Physiologie, 1898, Ixxi, pp. 357-398. - The latent period at 10° C. is seconds; at 15° C, ; at 20 C, ; at25° C, ; at 30° C, ; at 35° C, ; at 38° C, ; at 40° C, , from theaverages of a number of determinations. Mammalian Smooth Mnscle. — The Cats Bladder. 203 the early part of the relaxation. And, finally, the time of the relax-ation process shortens considerably. Fig. 14 is a reproduction of a series of actual curves obtained atvarious temperatures from 15° C. to above 50° C, under conditionsotherwise uniform. The variations in the height of the contraction must be consideredin connection with the general variations in tone of the bladder. Figure 14. — Temperature and the form of the curve. The numbers represent de-grees C. Time in seconds. muscle, already referred to. When the muscle is in a state of toniccontraction, the contractions resulting from stimulation are necessarilydecreased in height, though the total shortening of the muscle mayactually be greater than the height of the maximum contraction at40° C, where the tonic relaxation is also greatest. The height of thecontraction at any temperature cannot, therefore, be considered as anabsolute index of the irritability of the muscle at that temperature. The Elasticity of the Muscle and the Influence of theLoad on the Height of the Contraction. Under the influence of an increase in weight the bladder elongatesvery considerably. The changes in length take place more slowly 204 Colin C. Stewart.
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