INDEX TO FIGURES 



I'AOK 



Pressure curves from aorta and left ventricle (Piper) 674 



auricle (Piper) 674 



Priestley, portrait of 602 



Priestley's frontispiece 603 



Protoplasm contains colloidal particles when living 6 



,, liquid nature of - '2, 5, L' 1 



structureless appearance of, in living cell . 1, 6 



,, in fixed leucocyte 2 



Pterotrachea, statocyst of 527 



Pyramidal tract, origin from Betz cells (Holmes and May) 479 



R 



Ratchet mechanism, diagram of 534 



Reaction of earthworm muscle to stretching (Straub) 436 



Reciprocal irmervation in eye muscles (Descartes) - 493, 494 



of skeletal muscles (Sherrington) 496 



Records of heart sounds (Lewis) - 676 



Recovery of nerve impulses after decrement (Adrian) 384 



Reflex production of tonus by rheonome current (Sherrington and Sowton) 



Refractory period in heart muscle (Marey) 452 



and summation in heart muscle (Mines) 453 



,, ,, of nerve (Adrian and Lucas) 



stimulus in, produces no further refractory state (Lucas) 649 



Relative duration of electrical and mechanical change in heart (Mines) 539, 540 



(Piper) 658 



Removal of "lipoids" by perfusion of heart (Clark) 



Respiratory reflexes, diagram of (Head) 



from inflation and suction (Head) 632, 633 



metabolism of aspergillus as affected by presence of glucose 



(Kosinski) 18 



Retina, electrical changes in 



of dog, structure of (Ramon y Cajal) 



Retractor penis, inhibition and excitation - 



Reversal of vasomotor reflex by chloroform 



strychnine 697, 698 



Rhythmic stepping produced reflexly (Sherrington) 



Rigor mortis in presence and absence of oxygen (Fletcher) 



Ringer, portrait of - 



Root tubercles 



micro-organisms of - 



Scratch reflex, diagram of arcs (Sherrington) 

 Searle's torsion balance for measuring surface tension 

 Secretin, action on pancreatic cells - 



flow of pancreatic juice produced by (Launoy et Oeschlin) 

 Secretion of milk produced by pituitary extract 

 Segregation of dominant and recessive characters (Bateson) 



