854 



THE JOURNAL OF GENERAL PHYSIOLOGY 



Peptides : 



Amphoteric properties (Eck- 

 WEILER, NoYES, and Falk) 



291 



Phagocytosis : 



Solid particles (Fenn) 



439, 465, 575 



Photochemistry : 



Visual purple (Hecht) 



1, 285 



Photoreception : 



Role of integumentary pigment, 

 in Holothuria (Crozier) 57 

 Photosensory : 



Process, relation between 

 wave-length of light and its 

 effect on (Hecht) 375 



Physics : 



Physical behavior of casein 

 solutions (Loeb) 547 



Physiology : 



Physiological action of potas- 

 sium (Loeb) 229 



ion (Loeb) 



237 

 — zero (Krafka) 659 



Pigment : 



Integumentary, role in photo- 

 reception, in Holothuria 

 (Crozier) 57 



Plant: 



Herbaceous, differentiation of 

 leaf tissue fluids of, with 

 respect to electrical conduc- 

 tivity (Harris, Gortner, 

 and Lawrence) 343 



— , — of leaf tissue fluids of, 

 with respect to osmotic con- 

 centration (Harris, Gort- 

 ner, and Lawrence) 



343 



Ligneous, difl'erentiation of 

 leaf tissue fluids of, with 

 respect to electrical con- 

 ductivity (Harris, Gort- 

 ner, and Lawrence) 



343 



Plant — CO n tinned: 



Ligneous, differentiation of leaf 

 tissue fluids of, with respect 

 to osmotic concentration 

 (Harris, Gortner, and 

 Lawrence) 343 



Polyphemus : 



Limitlus, temperature coeffi- 

 cient of carbon dioxide pro- 

 duction by heart ganglion 

 of (Garrey) 49 



— , — coefficient of neurogenic 

 rhythm of heart of (Garrey) 



41 

 Polyporus : 



volvatus Peck, enzyme action 

 in (ScHMiTz) 795 



Popillia : 



japonica, response to light 

 (Moore and Cole) 



331 

 Potassium : 



Ion, chemical character (Loeb) 



237 

 — , physiological action (Loeb) 



237 

 Physiological action (Loeb) 



229 

 Radioactivity (Loeb) 



229 

 Potential : 



Membrane (Loeb) 667 



Production : 



Carbon dioxide, in heart gang- 

 lion of Limulus, action of 

 inhibitory nerves on (Gar- 

 rey) 163 

 Minute quantities of carbon 

 dioxide by organisms, appa- 

 ratus for measuring (Irwin) 



203 

 Propagation-velocity : 



Contraction-wave, in muscle 

 (Pond) 807 



Property : 



Amphoteric, of amino-acids 

 (Eckweiler, Noyes, and 

 Falk) 291 



