IV CONTENTS. 



Page. 



The sexual reproduction of sugar cane, Wilbrink and Ledeboer 438 



Yearbook of sufjar manufacture, Bock 439 



Report on tobacco culture in Montgomery County, Neel 439 



Contributions to the systematic classification of wheat varieties, Franz 439 



Experiments with wheat varieties in the Cape Province, 1910, Lamont 439 



Some wheat tests, MacPherson 439 



Svalof 's solhvete (sun wheat), Nilsson-Ehle 440 



Rooibloem, Pearson 440 



HORTICULTURE. 



A study of tlie nutrition of cultivated mushrooms, Hubert and Heim 440 



Pollination in orchards, Chittenden 440 



Practical orcharding on rough lands, Moore 440 



Suggestions on the storage of apples. Walker 441 



An index to illustrations of pears, Bunyard 441 



The avocado in Hawaii, Higgins, Hunn, and Holt 441 



On some natural citrus hybrids, Savastano and Parrozzani 441 



Mottled leaf not spread by budding, Coit 441 



Pruning and training the grape, Gladwin 441 



Chemical composition of grapes grown in Ohio, New York, and Virginia, Alwood . 441 



Fruit modeling, Truelle and Masseron 442 



Cirafting and propagating plants. Alderman 442 



FORESTRY. 



New England trees in winter, Blakeslee and Jarvis 442 



The American woods, exhibited by actual specimens, XII, Hough 442 



Trees, forestry, and lumbering 442 



A confusion of technical terms in the study of wood structure, Mell 442 



Canadian volume tables, Wilson 443 



Strength values for structural timbers, Cline 443 



The Yale transplanting board, Toumey 443 



Variation in time of nutrient absorption among trees and its importance, Ramann 443 



On some experiments with mountain pine, Zederbauer 443 



Regeneration of spruce in high altitucfes, Schaeffer 443 



Results of rubber tapping at Peradeniya, 1910-11, Bamber and Holmes 443 



Rubber tapping experiments, CoUens 443 



Notes on the tapping of Hevea rubber by the method of paring. Lock 444 



Experiments in tapping Hevea brasiliensis, Lock 444 



Experimental tapping of an old Hevea tree at Henaratgoda, Lock and Bamber. . 444 



Properties of Hevea rubber from Henaratgoda Gardens, Lock and Bamber 444 



On the collection of latex from Manihot glaziovii, Zimmermann 444 



Report of the director of forestry of the Philippine Islands for 1911, Ahren 444 



Progress report of the Forest Research Institute for 1910-11, Mercer 444 



Forest products of Canada, 1910. — Pulpwood, MacMillan, Robertson, and Boyce. 444 



Forest products of Canada, 1910. — Tight and slack cooperage, MacMillan et a'l . . . 445 



DISEASES OP PLANTS. 



The present service for protection against plant diseases and insects, Saulnier. . . 445 



California plant diseases, Smith 445 



Fungus diseases, Bovell 445 



Plant diseases due to fungi, Collinge 445 



Diseases of agricultural crops during 1910, Mortensen, Rostrup, and Ravn 446 



Some interesting plant diseases from Bulgaria, I, Bub^k and Kosaroff 446 



On Marasmius oreades and Clitocybe gigantea as causing fairy rings, Bayliss 446 



On the diseases of cereals caused by attacks of Fusarium, Mortensen 446 



Infection experiments with the grain rust occurring on Rhamnus, Muhlethaler. 446 



Intracarpellar prolification of Zea mays produced by smut infection, litis 447 



Mold on maize on the northern tablelands 447 



Rust in wheat and oats, Peacock 447 



The so-called dry spot disease of oats, Hudig 447 



Control of stinking smut ( Tilletia foe tans) in winter wheat, Stormer 447 



Notes on the club root of cruciferous plants. Van Poeteren 447 



The Corynespora leaf-spot disease of the cucumber, Laubert 447 



A serious lettuce disease and a method of control, Stevens and Hall 448 



