C O N T K NTS. 
Number 1. 
Page 
Sweet-Potato Black Rot, by B. D. Halstedand I). G. Fairchild. PL i-m... 1 
Experiments in the Treatment of Plant Diseases, Part in, by B. T. 
Galloway. PI. iv... 12 
Diseases of the Orange in Florida, by Lucien M. Underwood. 27 
Peach-Blight, by Erwin F. Smith. PI. v-vi. 36 
The Improved Japy Knapsack Sprayer, by B. T. Galloway. PI. vii-ix _ 39 
Notes on Some Uiiedine.e of the United States, by P. Dietel. 42 
New Species of Uredine^e, by ,T. B. Ellis and S. M. Tracy. 43 
A New Pine Leaf Rust, by B. T. Galloway. 44 
Observations on New Species of Fungi from North and South Amer¬ 
ica, by Prof. G. Lagerheim. PI. x. 44 
Reviews of Recent Literature . 50 
Untersuchungen aus dem Gesamintgebiete der Mykologie, Heft ix 
(Dr. OscarBrefeld).—CrittogamiaAgraria(Dr. O. Comes).—Der falsche 
Mehltau, sein Weseu und seine Bekampfung (J. Morgenthaler). 
Index to North American Mycological Literature, by D. G. Fairchild.. 52 
Number 2. 
Announcement. 65 
A Disease of Almond Trees, by Newton B. Pierce. PI. xi-xiv. 66 
Suggestions in Regard to the Treatment of Cercospora circumsclssa Sacc.. 
by B. T. Galloway. 77 
Club-Root in the United States, by A. C. Eycleshymer. PI. xv-xvi. 79 
Field Notes, 1891, by Erwin F. Smith. 88 
New Fungous Diseases of Iowa, by L. H. Pammel. 95 
Remarks on the Fungus of a Potato Scab, by Prof. G. de Lagerheim. 103 
Description of two new Species of Peronospora, by M. B. Waite. PI. 
xvn. 105 
Some Peronospo raceme in the Herbarium of the Division of Vegetable 
Pathology, by W. T. Swingle. 109 
New Species of Fungi, by J. B. Ellis and B. M. Everhart. 130 
Reviews of Recent Literature . 135 
A Provisional Host Index of the Fungi of the United States (W. 
G. Farlow and A. B. Seymour).—Phycomycetes, Rabenhorst’s Crypto- 
gemen-Flora (Alfred Fischer).—Fruit Culture in Foreign Countries 
(U. S. Consular Reports).—Sur la callose, nouvelle substance fonda- 
mentale existant dans la membrane; Sur les reactifs colorants de« 
substances fondamentales de la membrane; Sur la structure des Pero- 
nosporees; Sur la desarticulation des Conidies chez les Peronosporees 
(L. Mangin).—Annual Report of the State Botanist of the State of 
New York (Chas. H. Peck).—Fossil Botany (Solms-Laubacli).— 
Monographic du Pourridie des vignes et des arbres fruitiers (Pierre 
Viala).—Croonian Lecture: On some relations between host and par¬ 
asite in certain epidemic diseases of plants (H. Marshall Ward). 
Index to Literature. 153 
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