Periodical Literature . xxxiii 
Proceedings of the Society for the Promotion of Agricultural Science 
( continued ). 
Atwater : Notes on the Proportion of Nitrogen in Plants. 
Galloway : Some recent observations on the Black Rot of the Grape. 
Miles : Biological Factors in the Nutrition of Plants. 
Pammel : Some Root-diseases caused by Fungi. 
Scribner : Index to Grass Names. 
Report of the Department of Natural History of North-western University. 
1889. List of Mosses in the Babcock Herbarium. 
1890. Fresh Water Algae. 
Report of the Nebraska State Board of Agriculture for 1889 . 
Bessey and Webber : The Grasses and Forage Plants of Nebraska. 
Webber : Catalogue of the Flora of Nebraska. 
Report of the New York State Museum of Natural History. 43rd. 
Peck : Report of the Botanist. 4 Plates. 
Report, Ninth Annual, of the State Mineralogist of California. 
Yates : Insular Floras. 
Report of the State Geologist of New Jersey. Vol. II. 
Britton : Catalogue of Plants found in New Jersey. 
School, The. 1890. 
April. 
Ingraham : Among our earliest Flowers. 
May. 
Ingraham: A few May Flowers ( continued ). 
Lee : Plant-study in the Youngstown Schools. 
The Trees of Wick Park. 
Transactions of the Kansas Academy of Science. Vol. XII. Part 1. 
Carleton : Characteristic Sand-hill Flora. 
Transactions of the Massachusetts Horticultural Society. 
1889, Part 1. 
Bourn : The Evolution and Variation of Fruit Plants ; their tendency to 
degenerate when cultivated. 
Humphrey : Mildews. 
Harrison ; Subjects for attention connected with Forestry and Arbori- 
culture in Massachusetts and New England. 
Dawson : Shrubs that are perfectly hardy. 
Hyde: Plums — their Cultivation and Varieties. 
Gregory : The Onion — its Varieties and Cultivation. 
1890, Part 1. 
Ware : Horticulture of California. 
Sturtevant : Huckleberries and Blueberries — Gaylussacia and Vac- 
cinium , sp. 
Brooks : Fruits and Flowers of Northern Japan. 
Man da : Chrysanthemums. 
Whitcher: The Growth and Nutrition of Plants. 
Rothrock : Some Aspects of the present Forestry Agitation. 
Endicott : The Dahlia. 
d 
