1920] CONTENTS. lU 



AGRICULTURAL BOTANY. 



Page. 



Physiology of the apple, Butler, Smith, and Curry 28 



Keport of the department of chemistry, Smith 29 



Induced changes in reserve materials in evergreen leaves, Tuttle 29 



The compound interest law and plant growth, Blackman 29 



Seventeenth report of the Woburn Experimental Fruit Farm, Pickering — 29 



A comparative account of the root-nodules of the Leguminosfe, Spratt 30 



Observations on the anatomy of ash-wood, Holmes 31 



Floras of outlying islands of New Zealand and their distribution, Willis— 31 



Variation in Hevea brasiliensis, Whitby 31 



On double stocks, Jaramillo and Chittenden 31 



A new auxanometer, Haines 32 



FIELD CROPS. 



Report of agronomy department, Beeson 32 



[Field crops work at the Nacogdoches substation], McNess 33 



N'ariety tests of small grains, Taylor 34 



Disease-free sweet corn seed, Hoffer — _ 34 



[Experiments with varieties of oats], Akerman 34 



Effect of temperature on the keeping quality of potatoes, Butler 34 



Prickly pear as stock feed, Griffiths 35 



Farm practice in growing sugar beets in Montana, Nuckols and Currier — 35 



Growing suntlowers in ]Montana, Atkinson and Nelson ^ 35 



[Regulations regarding the culture of tobacco in Spain] 35 



Results of seed tests for 1919, Taylor 35 



Forty-eighth annual report of the State seed control, Dorph-Peterson 35 



HORTICULTURE. 



Report of the department of horticulture, Gourley 36 



[Report on horticultural investigations], Rolfs 36 



[Variety tests with truck crops], McNess 36 



Some experiments with tomatoes, Olney 37 



[Report on fertilizer experiments with tomatoes], McNess 37 



Analyses of insecticides and fungicides during 1919, Cathcart and Willis — 37 



[Spray calendars for orchard fruits] 37 



United States export trade in apples 37 



Cold storage for Iowa apples. — A, B, Whitehouse 1 38 



Fruit cool storage : Experiments with apples and pears, Esam 39 



Effect of temperature on resistance to wounding, Hawkins and Sando 39 



An index of hardiness in peach buds, Johnston 39 



Productive small fruit culture, Sears 40 



The resistance to drought of various graft-stocks, Sicard 40 



The preservation of vines from spring frosts, Degrully 40 



[Report on fruit investigations], Ajrekar 40 



[Notes on bananas, citrus fruits, and spices] 40 



The cambuci {Paivcea Umgsdorff), Campos Porto 40 



Necessity of selecting stocks in citrus propagation, Webber 41 



Injurious effects of the windstorm of November 20, 1919, Reed 41 



Causes of decay in citrus fruits. Burger 41 



The classification of chestnut varieties, Vigiani 41 



Pecan varieties, Reed 41 



Pecan grades and standards. Reed 41 



The crisis in medicinal plants and our African colonies, Cortesi 41 



FORESTRY. 



Relation of research in forest products to forest administration, Butler__ 41 



Report of the department of forestry, Woodward 41 



Chemical weed control in coniferous nurseries, Kitchin 42 



Management of hardwood forests in the southern Appalachians, Eldredge_ 42 



Handbook of forest protection. — California forest fire laws, 1919 42 



Organization for the national control of forest devastation, Olmsted 42 



The economics of private forestry, Kirkland -— 42 



Shall we capitalize our forests? Chandler,.,^, — .,^^„_„., — .^„„,.,_^_,,,„5; 43 



