Prologue:the Input Element＆by J．W．S．PRINGLE 1
The Retinal Organization of Vision in Vertebrates＆by W．A．H．RUSHTON 12
Visual Excitation:a Chemo-anatomical Study＆by G．WALD．P．K．BROWN and I．R．GIBBONS 32
The Optics of the Compound Eye＆by J．W．KUIPER 58
The Resolving Power of the Compound Eye＆by E．T．BURTT and W．T．CATTON 72
Spectral Sensitivity and Other Response Characteristics of Single Visual Cells in the Arthropod Eye＆by D．BURKHARDT 86
Some Non-photosynthetic Effects of Light on Higher Plants with Special Reference to Wavelength＆by O．V．S．HEATH and DAPHNE VINCE 110
The Utilization of Radiant Energy in Photosynthesis＆by C．P．WHITTINGHAM 138
The Reaction of Fungi to Light and the Problem of Photoperception＆by C．T．INGOLD 154
The Mechanism of Olfaction＆by J．T．DAVIES 170
Chemoreceptor Mechanisms in Insects＆by V．G．DETHIER 180
The Mechanism of the Perception of Gravity by Plants＆by L．J．AUDUS 196
Electric Receptors＆by K．E．MACHIN 227
Temperature Receptors in Animals＆by R．W．MURRAY 245
The Gap between the Hearing of External and Internal Sounds＆by G．VON BEKESY 267
The Transformation of Mechanical Stimulus into Nervous Excitation by the Labyrinthine Receptors＆by D．E．W．TRINCKER 289
The Electrophysiology of Single Mammalian Mechano-receptors＆by D．R．INMAN 316
Coding in Systems of Primary Receptor Neurons＆by J．A．B．GRAY 345
Epilogue:Receptor Mechanisms＆by O．E．LOWENSTEIN 355