This journal provides immediate access to some articles. Volume 22(1); January 1947 Articles Studies in the Metabolism of Crassulacean Plants: Changes in the Composition of Bryophyllum calycinum During Growth PMCID: PMC405835 Some Mold-Induced Changes in Shelled Corn PMCID: PMC405836 Changes in the Chlorophyll and Carotene Contents of Curing Burley Tobacco Cut at Different Stages of Maturity PMCID: PMC405837 Influence of Temperature on Growth and Alkaloid Content of Cinchona Seedlings PMCID: PMC405838 A Comparison of Photosynthesis in Individual Pine Needles and Entire Seedlings at Various Light Intensities PMCID: PMC405839 Changes in Food Reserves and Respiratory Capacity of Bindweed Tissues Accompanying Herbicidal Action of 2,4—Dichlorophenoxyacetic Acid PMCID: PMC405840 Studies on the Relationship between the Rate of Infection of Cotton Seedlings by Phymatotrichum omnivorum and the Available Oxygen Supply PMCID: PMC405841 Levulins and Inulin in Guayule, Parthenium argentatum A. Gray PMCID: PMC405842 Notes PMCID: PMC405844 Brief Papers: An Automatic Apparatus to Cover and Uncover Plants in Photoperiod Experiments PMCID: PMC405843 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||