CONTENTS. Ill 



Fertilizer economics, Bell 725 



The American fertilizer handbook, 1911 725 



Report of cooperative fertilizer and variety tests, 1911, Larsen 725 



Importance ot nitrate in the treatment of sewage and sludge, Guth and Keim . 725 



Effect of the "wet process" on availability of nitrogen, Hartwell and Pember. 725 



The calcium carbid industry 725 



The fertilizing value of the potassium silicate in phonolite, Geldmacher 726 



A chemical solution of feldspar 726 



Potash salts from seaweed. Green and Johnson 726 



Effect of ignition on solubility of soil phosphates, Fraps 726 



Sulphur requirements of crops in relation to the soil and air supply, Hart .... 726 



The fertilizing action of manganese, A. and P. Andouard 727 



Wool fertilizer, suints, and sheep guanos 727 



Soot: Its character and composition, Cohen and Ruston 727 



Inspection of commercial fertilizers, Ilaskins et al 727 



Inspection and analyses of fertilizers on sale in the State, Hand et al 727 



Tabulated analyses of commercial fertilizers, Frear 727 



Inspection and analyses of cotton-seed meal on sale in Mississipjii, Hand et al. 728 



Fertilizer trade in Spain, Frazer, Jr., and Norton 728 



AGRICULTURAL BOTANY. 



An elementary inquiry as to the origin of species, Firth 728 



The root habits of desert plants. Cannon 728 



The anatomy and some biological aspects of the ball moss, Birge 729 



Investigations on the respiration of plants, Zaleski and Reinhard 729 



Partial suppression of reserve matenal in seed and the development, Dclassus. 729 



On protein formation in ripening seeds, Schulze 729 



The influence of oxygon upon the alcoholic fermentation in peas, Iwanoff 731 



The nutrition of green plants with formaldehyde, Bokomy 731 



Influence of camphor, thymol, and menthol on hyacinths and tulips, Kryz 731 



FIELD CROPS. 



The experimental error of field trials, Mercer and Hall 732 



Field trials and their interpretation. Hall and Russell 732 



The interpretation of experimental results. Wood 732 



Methods of farming in older settled districts 733 



Variety tests during 1910, Lemmermann and Liebau 733 



[Experiments with field crops], Watts et al 733 



[Corn, sugar cane, rice, and cotton experiments], Stockdale 733 



Winter cereal report for 1910: State farm, Roma, Bungeworgorai 733 



Influence of low temperature and snow covering on wintering of cereals, Stebut 733 



Laying down land to grass on the Clifton Park system, Hunter 734 



Experiments on permanent grass land, 1911 734 



Establishing a breed of alfalfa for the irrigated lands of Colorado, Olin 734 



Growing alfalfa. Nelson 734 



The personal equation in breeding experiments, Pearl 734 



Corn culture, Kimbrough 735 



Cotton culture, Kimbrough 735 



Culture of Sea Island cotton in Cuba, Starrett 736 



Studies in Indian cotton, Leake 736 



Report on manurial trials on cotton, 1910, Hughes and Jefferys 736 



Chinese cotton production, Anderson 736 



Yield of potatoes under different methods of cultivation, Vasil'ev 736 



[Cultural tests with rye at the Zmiyev experiment field], Kramarevski 737 



Methods for the improvement of sorghum, Leidigh 737 



Sugar beet: Some facts and some illusions, Robertson-Scott 737 



Absorption and utilization of plant foods by the sugar beet, Dushechkin 737 



The influence of precipitation on the yield and quality of sugar beets, Herke . . . 738 



Data on the chemical composition of sugar beets of different sizes, Herke 738 



Examination of the beets of the crop of 1909-10, Dushki, Mints, and Pavlenko 738 



Growing tobacco for nicotin purposes 738 



Wheat and flour investigations, IV, Thatcher 738 



Results of seed analyses, Norton 739 



Weeds: Their peculiarities and distribution, Brenchley ,..,.,., 739 



