This journal provides immediate access to some articles. Volume 12(2); April 1937 Articles EFFECT OF LIGHT INTENSITY ON THE PHOTOSYNTHETIC EFFICIENCY OF TOMATO PLANTS PMCID: PMC439295 EFFECT OF CERTAIN NUTRIENT DEFICIENCIES ON STOMATAL BEHAVIOR PMCID: PMC439296 THE CONTINUOUS MEASUREMENT OF PHOTOSYNTHESIS, RESPIRATION, AND TRANSPIRATION OF ALFALFA AND WHEAT GROWING UNDER FIELD CONDITIONS PMCID: PMC439297 RELATION OF SULPHUR DIOXIDE IN THE ATMOSPHERE TO PHOTOSYNTHESIS AND RESPIRATION OF ALFALFA PMCID: PMC439298 INFLUENCE OF WEAK ELECTRIC CURRENTS UPON THE GROWTH OF THE COLEOPTILE PMCID: PMC439299 ELECTRICAL POLARITY AND AUXIN TRANSPORT PMCID: PMC439300 EFFECT OF ETHYLENE AND CERTAIN METABOLIC GASES UPON RESPIRATION AND RIPENING OF PEARS BEFORE AND AFTER COLD STORAGE PMCID: PMC439301 EXCHANGE OF ELECTROLYTES BETWEEN ROOTS AND ACID SOLUTIONS PMCID: PMC439302 UREASE DISTRIBUTION IN PLANTS: GENERAL METHODS PMCID: PMC439303 A RECORDING POTENTIOMETER FOR USE IN PHYSIOLOGICAL INVESTIGATIONS PMCID: PMC439304 CONTRIBUTION TO THE KNOWLEDGE OF PLANT PHENOLASES PMCID: PMC439305 EFFECT OF ULTRAVIOLET RADIATION ON INDOLE-3-N-PROPIONIC ACID PMCID: PMC439306 FACTORS AFFECTING COLD RESISTANCE IN PLANTS PMCID: PMC439307 GAS CONTENT OF CRANBERRIES AND POSSIBLE RELATIONSHIP OF RESPIRATORY ACTIVITY TO KEEPING QUALITY PMCID: PMC439308 NATURE OF THE BLACKMAN REACTION IN PHOTOSYNTHESIS PMCID: PMC439309 TUBERIZATION OF THE COLORADO WILD POTATO AS AFFECTED BY X-RADIATION PMCID: PMC439310 CALCIUM AND BORON CONTENTS OF THE APPLE FRUIT AS RELATED TO THE INCIDENCE OF BLOTCHY CORK PMCID: PMC439311 Brief Papers: METHOD OF STIRRING GASES WITHIN A CLOSED CHAMBER PMCID: PMC439312 Note NOTES PMCID: PMC439313 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||