1917] CONTENTS. IH 



Page. 



The extraction and saturation of soils with volatile antiseptics, du Buieson 519 



Fai'ms, forests, and erosion, Dana 520 



Measuring the surface temperature of soil, Dobiasha (Dobiache) 520 



Studies on soil colloids, II, Wolkoff 520 



Facilities for lysimeter and outdoor pot culture work at the station, Barker 521 



[Fertilizer experiments], Emanuel 521 



The stable-manure business of big cities, Fletcher 521 



Effect of soil reaction on ammonium sulphate, Cook and Allison 521 



The forms of phosphorus in granitic soils, Vincent 522 



Report on availainlity of potash, Vanatta 522 



importance of developing our natural resources of potash, Brown 522 



Fertilizer experiments with lime on tobacco soils, 1912-13, Cohen 522 



Fertilizer experiments with lime on tobacco soils, 1913-14, Sidenius 523 



Ground limestone for use in New York State, Barker and Baer 523 



The international trade in fertilizers. Van Hissenhoven 523 



Fertilizer analyses. Patten, Berger, SmoU, and De Windt 524 



AGRICULTURAL BOTANY. 



Department of botanical research, MacDougal 524 



Osmotic pressure in roots and leaves in relation to moisture, Iljin et al 525 



Nitrogen compounds in mulberry leaves, Katayama 525 



The emergence of the aerial organs in woodland plants, Salisbury 525 



Linkage in maize: Aleiirone and chlorophyll factors, Lindstrom 526 



The different meanings of the term '"factor, " Frost 526 



Notes on the flora of Sitka, Alaska, Anderson 526 



The chief types of vegetation in South Africa, Bews 526 



Effects of constituents of solid smelter wastes on l)arley, liipman and Gericke. 526 



Some effects of salt- treated soils on absorption by seeds, Gericke 527 



Certain effects under irrigation of copper compounds upon crops, Forbes 527 



Protection against pollution of waters and smoke and dust injurj', Stoklasa 528 



FIELD CROPS. 



Field experiments and compensating calculations, Leidner 528 



[The experimental error in field tests], Batyrenko 528 



[Report of field crops work], Taggart, Kerr, Hester, and Quereau 529 



Dry farming investigations at Moro, Oreg., Stephens and Hill 529 



Progress report. Substation No. 4, Beaumont, Tex. , 1909-191 1. Laude 532 



[Field crops], Zavitz 533 



Cultivated plants: Potatoes and sugar beets, Hitier 533 



Contribution to the study of Graminese, Girola 533 



Relation of winter temperature to winter and spring grains, Salmon 533 



Effect of gi-eenhouse temperatures on the small gi-ains, Hutcheson and Quantz . 533 



Experiments with spring wheat and oats, Fedorov (Fedoroff ) 534 



Thrashing injuries of wheat and rye, Walld^n 534 



Fibers from the Belgian Congo 534 



The agave fibers of Tunis, Guillochon 535 



Alfalfa culture, Williams 535 



Cassava as a competitor of maize and potatoes in production of starch 535 



Anatomical structure and peculiarities of varieties of clover, Zholtke\'ich 535 



Corn culture, Hutcheson, Hodgson, and Wolfe 535 



Corn variety tests, 1915 and 1916, Osborn 536 



Hybrids of Zea raraosa and Z. tunicata, Collins 538 



A method for detennining the percentage of self-pollination in maize, Waller. . 537 



Danthonia in New Zealand, Cockayne 537 



The dasheen ; its uses and culture. Young 537 



Flax-grow4ng experiments, 1914 and 1915 537 



Notes on the cultivation of flax by the ancient Egyptians. Munier 537 



Influence of methods of sowing oats on crop yield, Archangelskij 537 



Percentage of husk in varieties of oats, Pridham 537 



Standardization and classification of potato varieties for Michigan, Waid 538 



[Potatoes], Cadoret 538 



The production of potatoes by cuttings, Cadoret 538 



Potato growing and potato diseases from Maine to California, Morse 538 



Spraj-ing potatoes in 1916 538 



The transplanting of rice in Egypt, Mosaeri 538 



