The aim of the author in writing this book has been to give a short account of those experiments which can be carried out by students during classes, together with a description of experiments suitable for class demonstrations. The illustrations are numerous and for the most part new. The contents of this volume comprise 22 chapters, namely, chapter 1, some physical instruments in constant use and in physiologic experiments; chapters 2 and 3, frog's muscle; chapters 4, 5, 6 and 7, experiments on muscular contraction, tetanus, fatigue of muscle, thickening, excitability, polarization of electrodes; chapter 8 experiments to determine the function of nerves; chapters 9, 10, 11, 12 and 13, experiments on frog's heart; chapter 14, demonstrations of the movement of the mammalian heart; chapter 15, experiments in electro-physiology; chapters 16 and 17, on the circulation of the blood, sphygmograph; chapter 18, the kidney, demonstration of oncometer experiments; chapter 19,