IV CONTENTS. [Vol 40 



Page. 



Shipment of bulk wheat via Panama Canal, Birehard and Alcock 637 



The storage of English wheat, Saxby 637 



Some cultivated yams from Africa and elsewhere. Burkill 637 



[Report of the Official Seed Testing Station of England and Wales] 637 



Injurious weed seeds in feeding stuffs, Sifton 637 



Weeds of the wheat fields of the Fampa, Williamson 637 



Weed seeds and impurities in imported seeds. Breakwell 638 



Buried weed seeds, Brenchley 638 



Cooperative experiments in weed eradication, 1912-1917, Howitt 63S 



horticulture. 



Allotment gardening. — A complete guide, Thomas 638 



The control of garden insects and diseases. Parks and Stover 638 



Asparagus growing in New Jersey, DeBaun 638 



A variety test of cabbage, Myers and Gardner 638 



The pollination of fruit in relation to commercial fruit growing. Hooper 638 



[Progress report of fruit-hud studies]. Rolfs 638 



Using the spray gun in orchards, Lewis 639 



Pruning apple trees. FUenwood and Green 639 



New everbearing strawberries, Van Fleet 



Keeping quality of strawberries and temperature when picked, Stevens 



Commercial grape growing. Thayer and Green 640 



Tiie direct bearers at afontpellier, Ravaz and Antoniadis 640 



The herbaceous garden. Martineau 640 



Selecting ornamental shrubbery, Bontrager 640 



Decorative materials In the prickly pears and their allies, Griffiths 640 



Attractive farmsteads, Cady 640 



FORESTRY. 



Report of the forestry commission for 1918, Dalrymple Hay et al 640 



Progress report of Forest Research institute for 1917 18. Osmaston 640 



A combined map and panorama for lookout stations, Fritz 640 



Use of airplanes in forest patrol work, Graves 641 



Forest trees and ornamental shrubs grown at Government forest nursery, t'.ll 



Sugar as a coagulant for Eievea latex. Anstead 641 



Farm woodland development under the Smith-Lever Act, Tillotson 641 



The use of wood for fuel 641 



Pulp and paper investigations of Forest Products Laboratory. Edwardes_.. 641 



Puli) mills of the United states. Surface and Smith 643 



DISEASES OF PLANTS. 



Effect of ecological factors on Puccinia graminis, Stakman and Levine 641 



New biologic forms of Puccinia fframinia, stakman et al 642 



Wind dissemination of spores of bunt of wheat, Heald and George 642 



Production of an anthracnose-reslstant White Marrow bean, Burkholder.. 643 



Report of the botany division. I'.arre 643 



A preliminary note on a bacterial disease of foxtail, Rosen 643 



Pink root of onions. Taubenhaus 643 



Potato scab organism at various hydrogen ion concentrations, Gillespie C44 



A new disease of the Irish potato, Carpenter 644 



Blossom drop of tomatoes. Rolfs <'.tl 



Dissemination of Kt i>t<iria lycopersici by insects and pickers. Martin 



Lightning injury to herbaceous plants, Jones and Gilbert 646 



Lightning injury to grapevines. Reddick 64"> 



Lightning Injury to citrus treefl In Florida, Stevens 645 



1 mon diseases of ornamental plants, Cook 645 



Common diseases of shade and ornamental trees, Cook 645 



Exclusion legislation and fruit tree production, Stewart 645 



Notes on Perlderminms from Ohio, Pierce 645 



Hosl relationships of rusts which Bttack conifers, Rhoads et al 645 



Factors affecting viability of urediniospores of Vroiuirtium ribiCOla, Duff_ 645 



