1020] CONTENTS. HI 



Page. 



By-products from sowafre sludjrf. Weston n20 



Can the farmer mix liis own fertiliztM-s? Taylor 520 



Analyses of samples of eomiiiercial fertilizers collected during 1910 520 



Fertilizers: Notes on spring fertilizer inspection 521 



AGRICULTURAL I50TANY. 



The causes and course of orpjanic evolution, Macfarlane r>21 



Visibility of Menilelian splitting in pollen of (I'^nothera hybrids, Renner__ r)21 



OJudtficra Inmnrckiann nmtant simplex, do Vries 521 



Further studitvs on self-incompatibility in hermaphrodite plants. Stout — .l^l 



A study of Allocarya. l'ipt>r 522 



Kevisions of North American grasses, Hitchcock and Chase 522 



The diecious nature of buffalo grass, Schaffner 522 



Native vegetation near the Northern (Jrcnt I'lains Fii'ld Station, Sarvis — 522 



Upland societies of I'etoskey-Walloon Lake region, Clayberg 52:J 



The jihenological intluence of the sea, Hitter 523 



Experimental cultures of salad plants in seashore situations, Daniel 52.3 



The effects of gases on plants, Wehmer 523 



The intluence of fluorin on plants, Gautier and Clausmann 523 



Intluence of concentration of nutritive medium on plants, Gurlitt 523 



Effeets of acids and formation of soluble starches by mold fungi, Boas 523 



A new fungus destroying complex polysaccharids, lOpstein 523 



Breivling fungi on highly concentrated cane sugar sohitions, Bezssonof 524 



Conidia-forming materials. Boas 524 



The sexuality of Fhyvoniyces nifcns, Orban 524 



Auto-toxicity in Aspergillus niger, Boas 524 



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



Demonstration of lii)oids in plant cells, Czapck 524 



Passage of undissolved substance 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 



<;rowth curves, Rippel 525 



Regeneration of tendril tips and contact sensitivity, Lofller 525 



[The function of latex vessels], Simon 525 



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



Two crystalline phosjiho-organic salts in gi'een plants. Posternak 525 



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



Stiidies on the assimilation of carbon dioxid, Willstiitter and StoU 525 



Willstiitter and Stoll's recent work on assimilation by plants, Boruttau 52(> 



Tlie water absorption i-egion of roots, Coupin 52G 



Tlie response of plants to wireless stimulation, Bose 526 



Influence of colored lights on the coloration of Cyanophyce.T, Boresch 526 



The fate of chlorophyll in plants in autunm, Kolkwitz 526 



FIELD CROPS. 



Field heterogeneity as a factor influencing i)lat yields, Harris 526 



[Relation of plats to probable error in field experimentation]. Day 527 



IJselessness of hill selection under degeneration, Wellington 527 



Annual hay and forage crops, Waldron and ('hristensen 527 



Harvest repf)rt I Roseworthy Agiicultural College], 1919-20 Colebatch — 527 



Report on variety tests. 1914, Merkel 528 



(Report on field crops work in So\ith Australia, 1919-20], Spafford et al 528 



The im|iort;int legumes, II, Fruwirth 528 



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



' [Proceedings of the New Jersey Alfalfa Association] 528 



Bahia grass, Scott 528 



Shearman's clover (TrifoUitm fragifrrum var. ), Breakwell 528 



Selection in self-fertilized lines as basis for corn improvement, Jone.s 529 



A teosinte-maize hybrid, Collins and Kenipton 529 



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



Correlations of certain characters in cotton, Hodson 5.30 



Uphmd long staple cotton i'l Arkansas, Hodson 531 



The cultivation of cotton in the Ottoman Empire 531 



