1917] CONTENTS. HI 



Page. 



The structure of the bordered pits of conifers, Bailey 128 



Relation of transpiration to assimilation in steppe plants, Iljin 129 



Recent developments in the study of endotrophic mycorrhiza, Rayner 129 



Studies in the physiology of fungi. — I, Nitrogen fixation, Duggar and Davis. . . 129 



Studies in the physiology of fungi. — II, Lenziles sepiaria, Zeller 129 



The mitochondrial origin of rhodoxanthin, Moreau ? 129 



Distribution and role of arsenic and manganese in plants, Jadin and Astruc. . . 130 



Specific action of barium, Osterhout 130 



The plant as an index of smoke pollution, Crowther and Ruston 130 



Teratology in iris flowers, Armitage 130 



New dimorphic mutants of the Qi^notheras, De Vries 131 



Sterility as result of hybridization and condition of pollen in Rubus, Hoar. . . 131 



FIELD CROPS. 



Report of the agronomy division, Sahr 131 



Report of [field crop work at] the Glenwood substation, Thompson 132 



The possible Wayne County farm, Thorne 132 



The residual effect of fertilizers and manure, Thorne 133 



Effect of soluble nitrogenous salts on nodule formation, Fred and Graul 133 



Seeding small grains, XVilliams 134 



[Field crops] 134 



[Field crops] 134 



The cultivation of dry land, Escobar 134 



Field culture tests on peaty soils in 1915, Von Feilitzen 134 



[Culture experiments on moor soils at Flahult and Torestorp], Von Feilitzen . . . 134 



Time of sowing and haivesting forage crops on lowland moor soil, Lende-Njaa. 135 



Botanical composition of a 20-year-old moorland meadow, Mentz 135 



The culture of Bengal grass, teosinte, and Sudan grass, Schimmel 136 



Wild fodder grasses. Burns 136 



Carrots and turnips as catch crops, Vendelmans 136 



Bean culture, Strausz 136 



Early studies in selection of Trifolmm incarnatum and medicagos, De Cillis. . . 136 



Improvement of red clover, Beverley 136 



The relation of ear characters of corn to yield, Cunningham 136 



Lobed leaves in maize, Kempton 136 



Report on corn pollination, IV, Fisher 137 



Delbridge cotton-seed calculator, Delbridge 137 



Methi as a fodder crop in the Nasik district, Athalye 137 



Continuous oat culture on a highly nitrogenous moor soil, Von Feilitzen 137 



A racfds hypogxa, Dudgeon 138 



Potato fertilizers, Johnson 138 



The effect of removing the tops on the bearing of potatoes, Schlumberger 138 



[Potato varieties] 138 



Potatoes in California, Gilmore 139 



Potato growing in Washington, I, Morris 139 



Branchmg-headed rye grass, Green 139 



Botanical description of some varieties of Java and other canes, Fawcett 139 



Varieties of sugar cane. — Results of five years' experiments, Rosenfeld 139 



The planting of sugar cane in single and double rows. Cross 139 



Comparison of planting thin canes with canes of ordinary size. Cross 139 



Trials with thinning sugar cane in the row. Cross 139 



Suggestions relative to the cultivation of sugar cane in Tucumdn, Wale 139 



A study of the adsali cane, Padhye 139 



Japanese sugar cane as a forage crop, Leidigh, McNess, and Laude 140 



Sweet clover, Lutts 140 



The flowering habits of timothy, Evans 140 



On the improvement of Red Olona, Venino 141 



The roots of zacaton and their exploitation, Martinez 141 



CoiTelation phenomena in the physical properties of grain, Akemine 141 



Combating plant diseases by means of careful seed selection, Henning 141 



Twelfth report of Canadian'Seed Growers' Association, 1916 141 



Conversion of fern land into grass, Cockayne 142 



Goat's rue (Galega officinalis), Cockayne 142 



[Field crops], Hoffmann et al 142 



