1020] CONTENTS. HI 



Page. 



By-products from sewa{?e sludge, Weston 520 



Can tho farmer mix- his own fertilizers? Taylor 520 



Analyses of sanipU's of ('(HiiiiK'n-ial fortilizers collected during 191!) 520 



Fertilizers: Notes on spring fertilizer inspection 521 



AGRICULTURAL BOTANY. 



The caus(>s and course of organic evolution, Macfarlane 521 



Visibility of Mendelian splitting in ])o1Umi of (l^nothera hybrids, Kenner — 521 



(Enotlicra lainarckicuKt mutant siiiii)l(\i\ do Vri(>s 521 



Further studies on self-incomi)atil)ility in hermaphrodite plants, Stout — 521 



A study of Allocarya, Piiier 522 



Revisions of North American grasses, Hitchcock and Chase 522 



The diecions nature of buffalo grass, Schaffner 522 



Native vegetation near the Northern (Jrcat Plains Field Station, Sarvis 522 



Upland societies of Petoskey-Walloon Lake region, Clayberg 52;i 



The i)henological intluence of the sea, Hitter 523 



Experimental cultures of salad plants In seashore situations, Daniel .523 



The effects of gases on plants, Wehmer 523 



The influence of thiorin on plants, Oautier and Clausmann 523 



Intluence of concentration of nutritive medium on plants, rTiiiiitt 523 



I-]|fects of acids and formation of soluble starches by mold fungi. Boas 523 



A new fungus destroying complex polysaccharids, Epstein 523 



l^recding fungi on highly concentrated cane sugar solutions, Bezssonof 524 



■Conidia-fornung materials, Boas 524 



The s(>xuality of J'liycowyccs nitens, Orban 524 



Auto-toxicity in Aspergillus niger, Boas 524 



Studies on plant colloids. — VIII, Cellulose dextrins, Samec and Matula 524 



Demonstration of lipoids in plant cells, Czapek 524 



Passage of undissolved sni)stance from the cell nucleus, von Derschau 524 



Size and function of cell nuclei, Klieneberger 524 



Effect of reaction of solution on germination, Salter and Mcllvaine 524 



•Growth curves, Rippel 525 



Regeneration of tendril tips and contact sensitivity, Loftier 525 



(The function of latex vesselsl, Simon 525 



Recent notes on the nutritive layer of the pollen, Mascre 525 



Two crystalline phosidio-oi'ganic salts in green plants, Posternak 525 



The formation of solulde starch in elective nitrogen metabolism. Boas 525 



Studies on the assimilation of carl)on dioxid, Willstiitler and Stoll 525 



Willstiitter and Stoll's recent work on assimilation by i)lants, Boruttau 52(5 



The water absorittion I'egion of roots, Coupin 52G 



The resi)onse of i)lants to wireless stinndation, Bose 52G 



Intluence of col(»red lights on the coloration of Cyanophyce;i?, Boresch 526 



The fate of chlorophyll in plants in autumn, Kolkwitz 526 



FIELD CROPS. 



Field heterogeneity as a factor influencing i)lat yields, Han-is 526 



[Relation of plats to probable error in field exjierimentation], Day 527 



IJselessness of hill selection nndei- degeneration, Wellington 527 



Annual hay and forage crops, Waldron and Christensen 527 



Harvest report IRosewortliy Agiicultural CoUegel. 1919-20 Colel)atch___ 527 



■Report on variety tests, 1914, Merkel 528 



[Report on field cro]is work in South Australia, 1919-20], Spafford et al__ 528 



The important legumes. 11, Fruwirth 528 



Development of Peruvian alfalfa industry in the United States, Westover_ 528 



[Proceedings of the New .lersey Alfalfa Association] 528 



Bahia grass, Scott 528 



Shearman's clover (Trifolinm fragifcrum var.), Breakwell 528 



Selection in self-fertilized lines as basis for corn improvement, Jones 529 



A teosinte-maize hybrid, Collins and Kempton 529 



Lint frequency in cotton with a method for determination, Hodson 530 



Correlations of certain characters in cotton, Hod.son 530 



Upland long staple cotton in Arkansas, Hodson 531 



The cultivation of cottoa in tlie Ottoman Empire 531 



