IV CONTENTS. [Vol. 38 



[Seed testing and experimental work at Oerlikon, Zurich], Stebler et al 538 



Weed seeds and impurities in imported seed, Breakwell 539 



Solanum rostratam. — A uew weed plant, Osborn 539 



HORTICULTURE. 



Commercial plant propagation, Ilottes 539 



Color of seeds from crossing Phaseolas vulgaris, Lundberg and Akerman 539 



The common bean (Phaseolus vvlgaris), Comes 539 



Culture of kitchen vegetables on peat soil rich in nitrogen, von Feilitzen 539 



The principles and practice of pruning, Kains 539 



The cjuestion of "bulk " pruning, Gardner 540 



Report of the director of fruit culture, Benson 540 



Sixteenth report of Woburn Experimental Fruit Farm, Bedford and Pickering . . 540 



Statistics of vineyards, orchards, and gardens for 1916-17, Johnston 540 



Dusting V. spraying, Caeser 540 



Applying sprays for best results, Sanders 541 



Helpful hints on dusting peaches, Chase 541 



The why of the "June drop " of fruit, Heinicke. 541 



California's grape industry, Wetmore et al 541 



Where and how to grow avocados, Popenoe and Simmonds 541 



The native bananas of the Hawaiian Islands, MacCaughey 541 



Better California grapefruit, Shamel 541 



Relation of soil moisture to orange growth, Jensen 542 



Papaws, Watts 542 



Proper place of nut trees in the planting program, Reed 542 



Bay trees {Pimenta acHs), Watts 542 



The soil of Netherlands Indies and its use in agriculture 542 



Rhododendrons and the various hybrids, Millais 542 



An introduction to the study of landscape design, Hubbard and Kimball 542 



FORESTRY. 



Thh'd biennial report of the State forester of Kentucky, 1917, Barton 543 



Forestry, Pratt and Holmes 543 



Report of the Forest Research Institute for the year 1916-17, Osmaston 543 



Proceedings of the National Parks Conference 543 



Fai-m forestry, Foster, Millen, and Krausz 543 



Plan of cooperation between woodland owners and the State forester 543 



The case for New Brunswick's forests. Black 543 



British forestry, past and future, Somerville 544 



Forestation practice in Norway 544 



The trees at Mount Vernon, Sargent 544 



Tree growth in the vicinity of Grinnell, Iowa, Conard 544 



Oregon forest facts 544 



Firewarden 's handbook ; Oregon forest fire laws 544 



Present knowledge of forest formations of Isthmus of Panama, Pittier 544 



Forestry handbook. — II, Some commercial trees of New South Wales, Maiden. 544 



Probable error in field experimentation with Hevea, Bishop et al 544 



Results of tapping experiments with Ilcvca brasiliensis, de Jong 544 



The suitability of latexometers in field tests, Rutgers and Maas 544 



Thirty-seven years of spruce selection in Austria, Reus? 545 



The rotation period of teak, Beekman 545 



Forest terminology. — Terms used in the lumber industry 545 



DISEASES OP PLANTS. 



The Michigan plant disease sui'veji; for 1914, Coons 545 



'The control of plant diseases and injmious insects in Ontario] 5 15 



Plant diseases m Ontario] 546 



Plant diseases in Scotland, 1915], Wright et al 546 



Plant pathology [India], Butler 547 



Diseases and injuries to plants in Dutch East Indies, 1916, van Hall 548 



The rusts occurring on the genus Fritillaria, Rees 548 



Bacterial blight of barley , Jones, Johnson, and Reddy 548 



Stinking smut and loose smut in wheat and barley 548 



Potato and tomato diseases, Giddings 549 



