II CONTENTS. 



Page. 



The determination of ammonia in the air of Htables, A. Pagnoul 108 



Report of analyses of Paris green, etc., L. L. Van Slyke and W. H. Andrews. 108 



Analyses of Paris green and other insecticides, C. A. Goessniann 108 



Soluble arsenious oxid in Paris green, S. Avery and H. T. Beans 108 



The iodometric estimation of arsenic acid, F. A. Gooch and J. C. Morris 108 



Detection of arsenic in the presence of sulphites, J. F. Smith 108 



The detection of arsenic in beer and brewing materials, A. C. Chapman 108 



Potassium — microchemical detection, E. M. Chamot 109 



Chemistry in its relation to agriculture, F. B. Guthrie 109 



BOTANY. 



Critical points in the relation of light to jilants, D. T. MacDougal 109 



On the development of etiolated plants when placed in sunlight, H. Ricome.. 109 



On the synthesis of albumin by the higher plants in the dark, R. Schroder. . . 109 



Rheotropism of roots, F. C. Newcombe 110 



Thigmotropism of roots, F. C. Newcombe 110 



The relation of water plants to the solid substratum, R. H. Pond 110 



Influence of pure metals on plants, E. B. Copeland and L. Kahlenberg 110 



Effect of mechanical shock on longitudinal growth, J. B. Pollock Ill 



The effect of annular decortication of herbaceous i>lauts, L. Daniel Ill 



Notes upon albinism in sweet corn, B. D. Halsted Ill 



Loss of vigor in corn from inbreeding, H. J. Webber Ill 



The morphology of the fruit of Opuntia, J. W. Toumey 112 



Concerning manna produced l)y olive trees, Trabut 112 



The limits of variation in plants, J. W. Harshberger 112 



Phenological observations in Canada in 1899, A. H. MacKay 112 



Nitrogenous products of the seed and embryo of Litplnus albuf<, N. J. Wassilieff . 112 



The insular flora of Mississippi and Louisiana, F. E. Lloyd and S. M. Tracy .. 112 

 Grasses in Elliott's "Sketch of the l)otany of South Carolina and Georgia," 



F. Lamson-Scribner 113 



New or little known grasses, F. Lamson-Scribner 113 



Bermuda grass, A. S. Hitchcock 113 



Monograph of the North American Umbelliferw, J. M. Coulter and J. N. Rose. . 113 



Studies of American fungi, G. F. Atkinson 113 



Mushrooms or toadstools, L. F Henderson 113 



Edible and poisonous mushrooms and toadstools, W. Trelease 113 



Studies on influence of medium on polymorphism of fungi, J. Beauverie 113 



FERMENTATION JJACTEKIOLOGY. 



Investigations on acetic-acid bacteria, E. C. Hansen 113 



Growth of bacteria inthe presence of chloroform and thymol, E. F. Smith... 114 



Duration of life of typhoid bacilli in ice, etc., W. H. Park 114 



Use of carbolic acid in isolating BurHlns coll comnnmis, W. B. Copeland 114 



A compendium of bacteriological water investigations, W. Migula 114 



Formation of sulphureted hydrogen in town drains, etc., M. W. Beijerinck.. 114 



Bacteria in the Ames, Iowa, sewage-disposal plant, L. H. Pammel 114 



The action of light upon bacteria, A. Bournaret 115 



Use of paraftin to exclude oxygen in growing anaerobic bacteria, W. H. Park. 115 



The utility of a supply of live steam in the laboratory, H. A. Harding 115 



Catalase, a new enzy m of general occurrence, 0. Loew 115 



Oxidizing ferments in phanerogams, N. Passerini 115 



The occurrence of proteolytic enzyms in. germinating seeds, W. Butkewitsch.. 116 



Ferments of seeds with horny endosjierm, E. Bourquelot and H. Herissey.. 116 



Cacao fermentation, A. Preyer 116 



Diastases and their uses, C. Pozzi-Escot 116 



A proteolytic and a protein-coagulating enzym in germinating barley, F. "Weis. 116 



Formation of solanin in potatoes as a result of bacterial action, R. Weil 116 



A diastatic enzym in the potato plant, A. Meyer 116 



On the oxydase in kaki fruit, K. Aso 117 



A physiological function of oxydase in kaki fruit, K. Aso 117 



METEOROLOGY. 



Report of the Chief of the Weather Bureau, 1898-99, W. L. Moore 117 



Report of the Chief of the Weather Bureau, 1899-1900, W. L. Moore 117 



