Introduction＆Paul A．Campbell，Col．，USAF (MC) 1
DELINEATION 9
Energies of Solar Origin＆R．Grant Athay Walter O．Roberts 11
Energies from Cosmic Sources：Starlight，Nebulae，and Cosmic Rays＆Frank N．Edmonds，Jr． 20
Particulate Contents of Space＆Fred L．Whipple 49
Magnetic Fields＆Walter Dieminger 71
Geomagnetically Trapped Radiation and Interplanetary Cosmic Flux：The Radiation environment in the Interior of a Space Vehicle＆Alan Rosen 90
Radiation sources Carried by the Space Vehicle＆Donald M．Ross 130
The Gravitation Phenomenon and Its Energy Implications＆John C．Cook 154
ENERGY：THE KEY TO SPACE EXPLORATION 177
Address Delivered at Banquet，October 25，1960＆Don R．Ostrander，Maj．Gen．，USAF 179
APPLICATION 191
Energy Conversion and Balance in Manned Space Vehicles＆Hans G．Clamann 193
Energy Conversion in Photosynthesis＆Daniel I．Arnon 207
Minimum and Maximum Tolerances of Algae to Temperature and Light Intensity＆Robert W．Krauss Anthony Osretkar 253
Spectral Efficiency of Photosynthesis＆Eugene Rabinowitch 274
Radiation Tolerances in Photosynthesis and Consequences of Excesses＆Bessel Kok Leonard H．Bongers 299
Periodicity of Illumination and Photosynthesis in Space＆Jesse N．Phillips，Jr． 323
Logistics of Photosynthesis＆B．E．Welch 337
PROTECTION 347
The Interaction of Primary Cosmic Rays with Matter and Tissue＆Franklin Hutchinson 349
The Reaction of Secondary Cosmic Rays with Matter and Tissue＆George W．Crawford 367
Problems in Shielding＆John E．Pickering，Col．，USAF Ralph G．Allen，Jr．，Maj．，USAF Oskar L．Ritter 381
The Chemical and Biological Protection and Treatment of Mammals＆John F．Thomson Harvey M．P 391
Effects of Low-Level Repeated Exposures of Ionizing Radiation＆Gerrit L．Hekhuis，Col．，USAF (MC) 408
Electromagnetic Radiation＆Titus C．Evans 415
Particulate Radiation：Electrons and Protons up to Carbon＆Cornelius A．Tobias Roger Wallace 421
Particulate Radiation Heavier Than Carbon＆David G．Simons，Lt．Col．，USAF 443
Space Energies：Summation＆Hubertus Strughold，M．D． 463
APPENDIXES 471
Ⅰ．Definitions of Terms，Quantities，and Units 473
Ⅱ．Conversion Factors 476
INDEX 477