1919] CONTENTS. XiX 



Page. 

 Harvey, R. B., and R. H. True, Root Absorption from Solutions at Mini- 

 mum Concentrations 132 



Hawthorne, H. W., Some Points Brouglit Out by Successive Surveys of 



the Same Farms 693 



Healcl, F. E., and A. Dille, Agriculture in Ohio Elementary Schools. — A 



Manual for Teachers of Grades 7 and 8 298 



Hensel, R. L., Carrying Capacity of Ranges in Western United States 869 



Herbert, F. B., Insect Problems of Western Shade Trees 755 



Hetzel, H. C, Apple Grading Laws. — Their Value and Requirements 835 



Hiltner, R. S., and H. J. Wichmann, Zinc in Oysters 464 



Hitchcock, A. S., A Botanical Trip to Mexico, I-II 821 



Hoard, C, What is Potential Forest Land? 839 



Holloway, T. E., Parasite Introduction as a Means of Saving Sugar 261 



Holloway, T. E., Cane Borer Parasite Work in 1919 462 



Hood, J. D., Two New Genera and Thirteen New Species of Australian 



Thysanoptera 551 



Hopkins, A. D., The Bioclimatic Law as Applied to Entomological Re- 

 search and Farm Practice 16 



Houck, U. G., Hog Cholera and the Swine Industry 784 



Hough, G. J., Some Notes on Paint Analysis 314 



Howard, L. O., Entomology and the War 57 



Howell, A. H., Descriptions of Nine New North American Pikas 547 



Hubbard, P., Efficiency of Bituminous Surfaces and Pavements under 



Motor Truck Traffic 688 



Hubbard, P., and F. P. Pritchard, A New Consistency Tester for Viscous 



Liquid Bituminous Materials 789 



Hudson, C. S., The Rotatory Powers of the Aniids of Active a-Hy- 



droxy Acids 310 



Hudson, C. S., and S. Komatsii, The Rotatory Powers of the Amids of 



Several a-Hydroxy Acids of the Sugar Group 310 



Hudson, C. S., and S. Komatsu, The Amid of a-5-Maunoheptonic Acid 310 



Humphreys, W. J., et al.. Introductory Meteorology 15 



Hunter, W. D., The Work in the United States against the Pink Bollworm_ 256 

 Hunter, A. C, and C. Thorn, An Aerobic Spore-forming Bacillus in 



Canned Salmon 557 



Hutchison, R. H., and W. D. Pierce, Studies on the Dry Cleaning Process 



as a Means of Destroying Body Lice 255 



Jackson, F. H., jr.. Effect of Controllable Variables on the Toughness 



Test for Rock 788 



Jackson, H. H. T., An Unrecognized Shrew fz-om Warren Island, Alaska 353 



Jamieson, G. S., and H. S. Bailey, American Tomato Seed Oil 502 



Jensen, C. A., June DrOp and Its Relation to the Weather 658 



Jodidi, S. L., and S. C. IMoulton, The Cause of and Remedy for Certain 



Inaccuracies in Hausemann's Nitrogen Distribution Method 712 



Johns, C. O., and A. J. Finks, Lysin as a Hydrolytic Product of Hordein__ 11 

 Johns, C. O., A. J. Finks, and M. S. Paul, Studies in Kutrition. — I, The 



Nutritive Value of Coconut Globulin and Coconut Press Cake 262 



Johnson, J., and R. E. Hartman, Influence of Soil Environment on the 



Root Rot of Tobacco 248 



Kelly, E., The Utilization of Dairy By-products 80 



Kelly, E., Modern Developments in Dairy Inspection : 776 



Kempton, J. H., The Ancestry of Maize 727 



