1920] CONTENTS. XVII 



Weather Bltseat; — Continued. Page. 

 Climatological Data — 

 Volume 6 — 



Nos. 11-12, January-February, 1920 511 



Volume 7 — 



Nos. 1-2, January-February, 1920 810 



Report, 1919 318 



SCIENTIFIC CONTRIBUTIONS.' 



Adams, E. Q., The Absorption Spectra of the Nitric Esters of Glycerol 801 



Ainslie, G. G., The Cornpith Weevil (Ceivtrinus peniccllus Hbst.) 7G2 



Allen, E. W., Organization of Investigation in Agriculture 698 



Alsberg, C. L., The Government Scientist and the Conditions of the Service 798 

 Anderson, M. S., and W. H. Fry, Solid Phases Obtained by the Evaporation 



of Certain Soil Extracts 624 



Ashe, W. W„ Notes on Trees and Shrubs in the Vicinity of Washington__ 222 



Babcock, O. G., Some Poultry Lice and Mites Found in Colorado 660 



Baird, W. P., Com Experiments at the Judith Basin Substation 738 



Baker, A. C, Neotoxoptera violw and Its Allies 54 



Baker, A. C, and M. L. Moles, A. New Species of Aleyrodidse Found on 



Azalea 557 



Banks, N., and T. E. Snyder, A Revision of the Nearctic Termites, with 



Notes on Biologj- and Geograplaic Distribution 256 



Barber, G. W., Concerning the Distribution of North American Cicadellidfe 



(Hemip.) 450 



Barber, H. S., A New Tropical Weevil from Florida and Cuba 562 



Barnes, H., Use of Water from Kings River, Calif., 1918 .588 



Bates, C. G., Tree Windbreaks as a Farm Asset 650 



Baughman, W. F., and W. W. Skinner, The Determination of lodid and 



Bromid in Mineral Waters and Brines 13 



Bergman, H. F., The Effect of Cloudiness [on Submerged Cranberry 



Plants] 836 



Bethel, E., Puccinia subnitens, and its iEcial Hosts, II 444 



Blake, S. F., A Preliminary Revision of the North American and West 



Indian Avocados (Persea spp.) 239 



Blake, S. F., Revision of the True Mahoganies (Swietenia) 241 



Blake, S. F., Revision of Ichthyomethia, a Genus of Plants Used for 



Poisoning Fish 328 



Boving, A. G., and A. B. Champlain, Larvse of North American Beetles of 



the Family Cleridse 854 



Brandes, E. W., Artificial and Insect Transmission of Sugar Cane Mosaic- 547 



Brandes, E. W., Banana Wilt 848 



Braun, H., Presoak Method of Seed Treatment : A Means of Preventing 



Seed Injury Due to Chemical Disinfectants and of Increasing Germi- 

 cidal Efficiency 844 



Briggs, G., Guam Corn 638 



Buc. H. E., Delicate Test for Strychnin 116 



Burger, O. F., Causes of Decay in Citrus Fruits- 41 



Burger, O. F., Diseases of Fruit and Causes of Deterioration in Transit— 656 



Burke, H. E., Collecting Some Little Known Buprestidre 57 



1 Printed in scientific and technical publications outside the Department. 

 62212°— 21 2 



