It CONTENTS. I Vol. 38 



METEOROLOGT. 



Page. 



The sun and the weather, Abbot 114 



Sunspots, climatic factors, and plant activities, Harris 114 



The alleged influence of gunfire on rainfall, Deslandrea 115 



Gunfire and rainfall, Barbe 115 



Studying the science of evaporation 115 



On evaporation from a circular water surface, Thomas and Ferguson 115 



Soot-fall studies in St. Louis, Ohle and McMaster 115 



California earthquakes during 1916, Palmer 115 



Ohio weather for 1916, Alexander and Patton 116 



Weather notes, 1916, Oliver 116 



1 he weather of the past agricultural year, Brodie 116 



The weather of Scotland in 1916, Watt 116 



SOILS — FERTILIZERS. 



Studies on. the Paleozoic soils of North Wales, Robinson 116 



Influence of soil on decomposition of organic matter, Russell and Appleyard. . 117 



Changes caused by the conversion of dry_ soil into paddy soil, Harrison 117 



Forms of occurrence of phosphoric acid in soil, Jegorov 117 



The phosphate depletion of the soils of Bihar, Davis 118 



[Experiments on alkali soil], Hansen 118 



The importance of mold action in soils. Brown „ 118 



Carbon dioxid production in soils variously treated, Potter and Snyder 118 



Nitrification of pyridin, guanidin carbonate, etc., in soils, Funchess 119 



The maintenance of soil fertility, Thorne 119 



Fertilizers as an aid to profitable farming, Amott 119 



Fertilizing California soils for the 1918 crop, Lipman 119 



Fertilizer experiments 120 



The value of activated sludge as a fertilizer, Hatfield and Bartow 120 



Experiments in the bacterization of peat for soil fertilizing purposes, Jones 120 



Nitrification of different leathers anci of sulphureted rape cakes, Guillin 121 



Action of ammonium salts on the growth of barley, Soderbaum 121 



Manufacture of synthetic nitrates by electric power, Scott 122 



Manganese as acatalyst in atmospheric nitrogen fixation by plants, Rocasolano. . 122 



Reversion of acid phosphate, James 122 



Notes on the greensand deposits of the Eastern United States, Ashley 122 



Manufacture of potash from feldspar 123 



The recovery of potash as a by-product in the cement industry, Ross et al 123 



Recovery of potash as a by-product in the cement industry, Ross and Merz 124 



The nature of cement mill potash, Nestell and Anderson ^ 124 



Recovery of potash from beet and cane molasses in the United States, Horn 124 



Comparative values of ground and dolomitic limestone, von Feilitzen 124 



Lime on the farm, Guthrie 124 



Law in relation to commercial fertilizers 124 



Commercial fertilizers, Curtis et al 124 



AGRICULTURAL BOTANY. 



Dictionary of plant names, Gerth van Wijk 125 



Notes on new or rare species of Ravenelia, Long 125 



Plants, seeds, and currents in the West Indies and Azores, Guppy 125 



Observations on a new type of artificial osmotic cell, Rosett 125 



Osmotic concentration of tissue fluids, Harris and Lawrence 125 



Osmotic concentration of leaf sap and height of leaf insertion, Harris, et al 126 



Effect of surface films of Bordeaux on transpiring power, Shive and Martin 126 



Permeability of membranes as related to their composition, Denny 126 



Resistance of seed coats of Abutilon tkeophrasti to intake of water, DaAis 126 



The viability of raddish seeds, Waggoner 127 



Influence of light on germination of Nicotiana tabacum, Honing 127 



The growth of isolated plant embryos, Buckner and Kastle 127 



Observations on the chondriome in tulip flowers, Guilliermond 127 



Character and alterations in chondriomes of the tulip flower, Guilliermond 127 



The action of oxidase on anthocyanin, Nagai 128 



Sugar content of potatoes as related to age and liquid air, Waterrnan 128 



Effect of ringing on transfer of materials in Cornus controversa, Hibino 128 



Recent studies on sectioning and regeneration in plants, Daniel. 129 



Cause of disappearance of coumarin, vanillin, pjTidin, and quinolin, Robbins. . . 129 



