1920] CONTilNTS. Ill 



Page. 



Venation and senescence of polyembryonic citrus plants, Ensign 133 



Studies concerning the evolutionary status of polycotyledony, Buchliolz__ 133 



Flax blooms, Tammes ^ 133 



FIELD CROPS. 



Farm crop investigations, Metzger et al 133 



tP'ield crops] work of the San Antonio experiment farm in 1918, Letteer 134 



[Report of the] agronomy department, Vass 134 



Experiments with buckwheat, Stemple 135 



The modified rag doll and germinator box, Duddleston 135 



Comparison of fertilizers for corn and cotton, Cauthen 135 



Haw phosphates v. acid phosphate for cotton, Keitt and Murray 136 



Influence of factors on time of opening of cotton, Keitt and Murray 136 



Growing cotton in Arizona, Thompson and Wood 137 



Darso, Beeson and Daane 137 



Report of oats experiments, 1908-1919, Nelson and Osborn 137 



[Experiments with potatoes], Appleman et al 138 



Prairie rice culture in the United' States, Chambliss 139 



Soy bean experiments, Stemple 139 



Further studies in fertilizing and storing sweet potatoes, Stuckey 139 



Sweet potato culture and storage in New Jersey, DeBaun , 140 



Supply and distribution of Connecticut Valley cigar leaf tobacco, DeVault 141 



Whorled milkweed, the worst stock-poisoning plant in Colorado, May 141 



Common thistles, Fiske 141 



HORTICULTUKE. 



An investigation in transplanting, Whitten 141 



[Horticultural investigations at the Maryland Station], Ballard et al 143 



Handling spinach 144 



Grades for tomatoes 144 



[Horticultural work at San Antonio experiment farm in 1918], Letteer 144 



Orchard survey of Fremont County, Sandsteu and Tompkins 144; 



Fertilizers for Oregon oi'chards 145 



Pruning the apple, Gardner 146 



Spraying peaches, Stuckey and Biggins 146 



Strawberries in Nebraska, Wiggans 146 



Report of the cranberry substation from 1917-1919, Franklin 146 



Work with Titis rotundifol'ia, a species of muscadine grapes, Stuckey 147 



Fruit and fruit products of South Africa, Davis 148 



Flowering plants and ferns, Willis 148 



FOKESTEY. 



The forestry of the Prophets, Leopold 148 



Forestry movement of the seventies in the Interior Department, Peyton 148 



Efficient regulation of grazing in relation to timber production, Jardine 148 



The relation of insect losses to sustained forest yield, Pearce 148 



Standing timber insurance. Brown 148 



The Jonson " absolute form quotient," Claughton-Wallin and McVicker 149 



The forests of Quebec, Piche 149 



Management of second growth pine in New England, Fisher and Terry 149 



The hardwoods of Australia and their economics. Baker 149 



The improvement of West African rubbers, Van Pelt 149 



Vegetation of Philippine Mountains at different altitudes, Brown 149 



Dry zone afforestation and reclamation of waste land, Griessen 150 



Forest administration in Northwest Frontier Province 1918-19, Parnell— 150 



Forest administration in Baluchistan, 1918-19, Muhammed Afzal 150 



Forests, forestry, and forestal products 150 



Production of lumber, lath, and shingles in 1918, Smith and Pierson 150 



DISEASES OF PLANTS. 



I 



Report of the botanist, Leach 150 



t3 diseases of garden crops [in Iowa], Oilman 150 



