CONTENTS. ni 



Page. 



Physical and chemical processes in soil formation in the Tropics, Vageler 619 



The condensation of water vapor in the soil, Marchenko 620 



Influence of woods on the temperature of the soil and subsoil, Nesterov 620 



The relation of colloidal silica to certain impermeable soils, Kellerman 620 



The role of mica in cultivated soil 620 



Increase in nitrates in limed as compared with unlimed soils, De Verteuil 620 



On the action of crushed quartz upon nitrate solutions, Patten 620 



Investigations on the behavior of different kinds of humus, Emeis 620 



On the occurrence of Azotobacter in peat soil, von Feilitzen 621 



Micro-organisms other than bacteria in soil fertility, Russell and Hutchinson. . 621 



Methods of improving sandy soils, Bogdanov 621 



The management of pineapple soils, Kelley 621 



Results of soil investigations as affecting the use of fertilizers, Carpenter 621 



Fertilizing for profit. Miller 621 



Farm fertilizers, Knapp 622 



Investigations of bedding materials and their effect on manure, von Feilitzen. . 622 



The nitrate of soda industry of Chile, Maizi^res 622 



Outlook of Chilean nitrate business, Winslow 622 



Nitrate industry of Chile, Fletcher 622 



[Productica, exportation, and consumption of Chilean nitrate, 1910], Fisher. . . 622 



Annual reports on nitrate of soda 622 



Saltpeter, Holland and Fermor 623 



Saltpeter, La Touche 623 



A contribution to the study of calcium cyanamid, Brioux 623 



Formation and decomposition of calcium cyanamid, Le Blanc and Eschmann. 624 



The need of the soil for potash. Hoc 624 



Kainit, Maurecourt 624 



German potash situation 624 



German potash prices, Albert 624 



Our supply of phosphate and its origin, Woolman 624 



Tennessee phosphate in 1910, Ruhm, jr 624 



Phosphates in Montana, Gale 624 



The phosphates of the Pacific Isles, Maizieres 625 



The reaction of lime and gypsum on some Oregon soils, Bradley 625 



Note on the composition of soot, Harvey 625 



Analyses of sea weeds. Barlow 625 



Inspection of commercial fertilizers, Haskins, Walker, and Merrill 625 



Results of the fertilizer inspection for 1910, Curry and Smith 625 



AGEICULTUEAL BOTANY. 



A text-book of botany. — I, Morphology and physiology, Coulter et al 626 



Sap-raising forces in living wood, Reinders 626 



Contribution to the knowledge of the movement of water in plants, Zijlstra 626 



Relation of living cells to transpiration and sap flow in Cyperus, I, Overton 626 



On the substitution of assimilating organs in plants, Jonsson 627 



Experiments on Drosera rotundifolia as to its protein-digesting power, Robinson. 627 



The proteolytic enzym of Drosera, WTiite 627 



Investigations in chlorophyll, Willstatter et al 628 



The beginning of photosynthesis and the development of chlorophyll, Irving. . 628 



A physiological study of the germination of Relianthiis annuiis, Miller 628 



Development and nutrition of the embryo, seed, and carpel in the date, Lloyd . . 629 



The respiration of barley during germination, Abrahamsohn 629 



The synthetic formation of asparagin by plants, Prianishnikov and Shulov . . . 629 



Trials of nitrogen-fixing organisms, Malthouse 629 



Concerning the physiological role of latex, Bernard 629 



Tannin in the living plant and its physiological significance, Van Wisselingh. . 630 



The effect of acids, alkalis, and some inorganic salts on plants, Gedroits 630 



Influence of iron on the formation of spores in Aspergillus niger, Linossier 630 



On the death of plants from low temperatures, Richter 630 



Notes on intumescences in roots, Davis 631 



The effect of tarring roads on plants, Mirande 631 



The influence of tarring roads on neighboring vegetation. Griffon 631 



A method of selection applicable to tropical agriculture, Cramer 631 



The inheritance of sizes and shapes in plants, Emerson 632 



The natiire of graft hybrids, Campbell 632 



