This journal provides immediate access to some articles. Volume 4(4); October 1929 Articles COMPOSITION AND GROWTH INITIATION OF DORMANT BARTLETT PEAR SHOOTS AS INFLUENCED BY TEMPERATURE PMCID: PMC440077 RELATION BETWEEN THE DEVELOPMENT OF ROOT SYSTEM AND SHOOT UNDER LONG- AND SHORT-DAY ILLUMINATION PMCID: PMC440078 SOME SEASONAL CHANGES IN THE TRACHEAL SAP OF PEAR AND APRICOT TREES PMCID: PMC440079 PHYSICAL MEASUREMENTS OF THE WINTER WHEAT PLANT AT VARIOUS STAGES IN ITS DEVELOPMENT PMCID: PMC440080 SOME EFFECTS OF CALCIUM DEFICIENCY ON PISUM SATIVUM PMCID: PMC440081 THE INSOLUBLE TYROSINASE OF THE VELVET BEAN SEED COAT PMCID: PMC440082 THE DETERMINATION OF NITRATE IN GREEN TOMATO AND LETTUCE TISSUES PMCID: PMC440083 MOISTURE FLUCTUATIONS IN EXTRACTED PLANT SOLUTIONS AND IN LEAF TISSUE PMCID: PMC440084 THE EFFECT OF pH VALUE ON THE INACTIVATION TEMPERATURE OF FRUIT OXIDASE PMCID: PMC440085 Brief Papers: JOANNES BAPTISTA VAN HELMONT PMCID: PMC440086 Note NOTES PMCID: PMC440087 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||