II CONTEXTS. [Vol.40 



Page. 



The detpction of vpcretablp gums in food products, Cook and Woodman 410 



Maximum vitamin content of Philippine vpgptahlps. Brill and Alincastre— 410 



Formation of ammonia and amlns in canned sardines, Weber and Wilson. 411 



Microscopic color reaction for wheat, rye. and potato starch, l*nna 411 



Thp true composition of sugar cane molasses, Pellet 412 



Detprmination of carbon dioxid in baking powders, Rupp and Wohnlich__ 412 



A new formula for the calculation of added water in milk. Harris 412 



Reichert-Meissl number according to Bondzynski and Run, Preacher 412 



The oxidase reaction for the detection of rancid fafs. Preacher 412 



Acetylmethylcarbinol in sorghum silacro. Fripdemann and Dowell 412 



Modifications of Benedict's and Folln's sugar methods. Haskins 41.", 



New titration method for determination of uric acid in urine. Morris _ 4-)^ 



Detection of methyl alcohol, Mane 413 



Lead in pharmaceutical zinc oxid, Collins and Clarke .11:: 



A BpeciaUbleaching powder for use In hot countries, Rettie el al 413 



Relation of dehydration to agriculture, Prescotl 411 



[Investigations on cider], Grove 414 



The manufacture of cider apple jelly, Barker n 1 



Grape sirup. Riolotti and CrueSB 411 



Industry of lactose and of the vegetable casein of the soy bean, Beltzer 11." 



Thp utilization of waste products, Roller 11:. 



Report of the agricultural chemist, Brflnnich h.~. 



mi rsoBoi o(,y. 



A much npeded change of emphasis in meteorological research, Franklin. 416 



Correlations between solar activitj and far eastern climates, Seklguchl tic, 



Clouds and their significance in local weather forecasting, Palmer . in; 



Monthly Weather Review lie 



Meterological records for the year ending November 30, 1017. Burke 417 



BOILS FEBTELIZKBS. 



Relation of Inorganic soil colloids to plowsole in citrus grovt 5, Jei sen . 417 



Nitrification and it-- Importance from ecology polnl of vi< w, H sselman 418 



The shrinkage of soils 11:1 



[Report of soil Investigations In Montana], Burke 419 



Soil survey of Monroe County, Ala., Smith et nl . 4i:» 



Soil survey of porter County. Ind., Bushnell and Barrett 120 



Soil survey of Cleveland County, N. <\. Vannatta and McDowell 420 



Soil survey of Payne County, <>kia.. Cobb and Hawker _ 420 



Analyses of Weal Virginia soils. Salter and Wells 120 



Effect of farm manure in stimulating Irrigated field crops, s.-ofield 40] 



Plant products anil chemical fertilizers, Collins pji 



I Fertilizers in relation to production in the United States in 1010] 4 J 1 



[Fertilizer needs of England, France, ami Italy], Thompson et al 422 



Experiments with fertilizers. Stookey 122 



[Nitrate of soda for corn in the South] 422 



Experiments on greensand as a source of potassium, True and — 423 



Limestone action on acid -oils, Stewart and Wyatt 423 



Commercial fertilizers. 1918, Woods 424 



AOKICUXTURAl BOTANY. 



Atmospheric electricity as an environmental factor, JOrgensen and stiles. \:\ 



On the ecology of the vegetation of Breckland, V, Farrow i'-'i 



Competition between Galium wtxattte and 0. sylvestre, Tansley 124 



Plant life on saline soils. Kearney t2l 



Comparative salt requirements for young and mature buckwheat, Shive 42."s 



Factors determining character and distribution of food reserve, Sinnotl 12.". 



The nature and role of mitochondria in vegetable cells, Gullllermond .-_ 125 



Formation of nitrites from Ditrates by sunlight, Moore 42."> 



Action of lighl rays on organic compounds, Moore and Webster 126 



Oxidases: Presence and function in sm_ r ar cane, Naraln 426 



The evaluation of the soil temperature factor in root growth, Cannon _. 126 



Determination of wilting, Bakke 427 



Fertility in Cicharium tntybVS, Stout 127 



