II CONTENTS. IVol. 30 



Page. 

 A comparison of barbituric acid, tliiobarbituric acid, and maionylguanidin as 



quantitative precipitants for furfurar,' Dox and Plaisance 318 



Methods in soil analysis. Bear and Salter 318 



Estimation of tMosulphate sulphur in lime-sulphur, Blumenthal and Averitt. . 318 



(Tleport of the chemical division], Wright 319 



The conservation of fruits and vegetables by desiccation, Valvassori 319 



Instructions for processing fruits and vegetables for exhibition only. Page 319 



Report on vegetable dyestuffs, Marsden 319 



SOILS — FERTILIZERS . 



Measurement of the surface forces in soils, Shull 319 



Indirect methods for hygroscopic coefficients of soils, Alway and Clark 320 



Note on soil denudation by rainfall and drainage, Hope 320 



Soil aeration in agriculture, Howard 320 



The toxicity of bog water, Kigg ._ 320 



Some factors influencing nitrogen fixation and nitrification, Williams 321 



Production of alkali in soils by denitrification, Aladjem. 321 



Further observations on protozoa in relation to soil bacteria, Goodey 322 



Soils of the Sabak district on the Bernam River, Grantham 322 



Investigation of the peat bogs and peat industry of Canada, 1913-14, Anrep. . . 322 



The analysis of soils, Wild 322 



Bureau of Soils, U. S. Department of Agriculture, Whitney 323 



Artificial manures, 1916 323 



Soil fertility considerations in the feeding of hogs and milch cows, Forbes 323 



Plant food deficiencies of Coastal Plain and Piedmont soils, Williams 323 



Note on the soil of the experimental farms [in Burma], W^arth 323 



Fertilizer experiments with sugar cane on red clay soil, Gile and Carrero 323 



The residual effects of fertilizers, Bear, Salter, et al 324 



[Experiments in Java with green manures], Van Helten 324 



Loss of organic matter in green manuring, Boltz 324 



Utilization of nitrogen of manure in relation to time of manuring, Sabashnikov . 325 



Bat guanos, Gile and Carrero 325 



The availability of nitrogen in garbage tankage, Schroeder 325 



Potash in Salduro salt deposit. Gale 325 



Action of calcium carbonate on acid phosphate, Magruder 325 



A critique of the hypothesis of the lime-magnesia ratio, I, II, Lipman 326 



Effect of manganese on ammonification and nitrification, Brown and Minges. . . 326 



Commercial fertilizers, Hibbard 326 



Analyses of commercial fertilizers, Wessels et al 327 



AGRICULTURAL BOTANY. 



Department of botanical research, MacDougal 327 



Artificial absorption of liquids by plants, Acqua and Jacobacci 328 



A study of physiological balance in nutrient media, Shive 328 



Influence of salts on secretion of diastase by P. camembertii, Robbins. 328 



Nitrates in suUa (Hedysarum coronarium) and other legumes. Campanile 329 



Glucosid foi-mation by plants, Ciamician and Ravenna. 329 



Significance of the flavone derivatives in plants, I-III, Shibata et al 329 



Relation of oxidases and catalase to respiration in plants, Appleman 329 



On the relation between transpiration and stomatal aperture, Darwin 329 



The perception of heliotropic stimulus in plants, Campanile 330 



Relation between geotropic sensitivity in roots to statoliths, Jacobacci 330 



Relation of geotropic sensitivity in roots to statoliths, Jacobacci 330 



The vitality of seeds binied in the soil, Beal 330 



Mechanics of dormancy in seeds, Crocker 330 



P'oliar structure in some oaks having persistent leaves, Donati 330 



Mesophyll structure and function in grains, Catalan© 331 



The nature of the inflorescence and fruit of Pyrus mains, Black 331 



Notes on parthenocarpy , Longo 331 



Department of experimental evolution, Davenport 331 



A new graft hybrid, Manaresi 331 



Significant accuracy in recording genetic data, East 332 



