116 



INDEX 



Stalagmometer, 14 

 Stannius ligature, 78 

 Stereotropism, in earthworm, 4 



in sow bug, 6 

 Stimulation of chromatophores by ions, 34 

 Strychnine, 58 



Sugar, permeability of Spirogyra to, 68 

 Summation, in muscle, 48 



in reflex action, 60 

 Surface tension, 10-14 

 Swelling of gelatin, 18 

 Synapse, delayed conduction in, 58 



Tonus, in turtle's auricles, 88 



Traube's rule, 36 



Treppe, 80 



Turtle heart, 86 



Twitch of frog's muscle, 46 



Tyndall effect, 20 



U 



Urea, permeability of red blood cells to, 68 

 Spirogyra to, 68 



V 



Temperature, characteristics, 76-78 



effect on breathing movements of frog, 76 



CO2 production of muscle, 76 



digestion, 26 



frog's heart, 86 



heart of earthworm, 92 



muscular contraction, 56 



opercular movements of gold fish, 78 



surface tension, 14 



turtle's auricles, 90 

 Tetanus, in crustacean heart, 94 



in frog's muscle, 48 

 Tonic immobility, in newt, 10 

 Tonometers for blood-gas work, 98 



Vagus nerve, action of, on turtle's heart, 



of frog, 86 

 Van der Mensbrugghe's experiment, 10 

 Van Slyke blood-gas pump, 96 

 Veratrin, 58 



W 



Warburg-Barcroft respirometer, 108 

 Water, distilled, action on muscle, 46 

 Wheat seedlings, effect of ions on, 14 



Yeast, dehydrogenase, 22 



