IV CONTEXTS. [Vol.40 



Page. 



Fifteenth annual report of the State forester [of Massachusetts], Rane 744 



Preliminary report of some forest experiments in Pennsylvania, lllick 744 



The mechanical theory of diameter growth in trees, Jaccard 744 



Tamarack for fence posts, Crumley 744 



The structure and use of the Parana- pine forests of Brazil, Whitford 745 



Philippine bamboos, Brown and Fischer 745 



Philippine forest products as sources of paper pulp, Brown and Fischer 745 



DISEASES OF PLANTS. 



The biochemistry of resistance to disease in plants 745 



[Report of] division of plant pathology 745 



Spraying for fungus diseases: How to prepare Bordeaux, McAlpine 7 1<; 



Copper stcarate, Lees 746 



Diseases of grains and forage crops, Cook and Heh ar 747 



Oat smut control, Van Pell 747 



Fungoid and insect pests and their control, I, Mosley 717 



The Rhizoctonia disease of asparagus, Barker and Guningham 747 



( in ion diseases found in Ohio, Van Pelt 747 



Potato diseases in New Jersey, Cook 747 



Potato spraying, Pickering 747 



Potato spraying for formers, Salmon 748 



Diseases of tomatoes, Cook and Martin 748 



Damping-off and collar rot of tomatoes, Spinks 748 



Fungus diseases [of frail trees], Davey 748 



Silver leaf disease, Hayward 748 



Black spol of pear. Veal! 748 



Notes on the fruit blossom bacillus, < irove 749 



Black spot and leaf curl, Laidlaw and Brittlebanki 749 



Control of brown n >t, O 'Hard 749 



Plum diseases, Soursac - 749 



How to com I nit fungus diseases, de Castella 750 



( ialcium carbid for grape ( (idium ami downy mildew , Laymond 750 



Rational protection for grapevines af ainsl downy mildew, Audebert 7">»» 



Positive control of grape downy milder , Cadorel 750 



( Irape downy mildew control during I'M 8, < adorcl 7"><> 



Precipitation and grape downy mildew in I'M 7, chajii.il 750 



l ielworm disease I blackhead ) of bananas, Nowell 750 



Bud rot disease of coconuts, Ashl »y 



Diseases of coconuts in Jamaica, Nowell 761 



The minimum Bordeaux application for the control of Bemileia, Africa 751 



The diseases of roses, Massey 751 



ECONOMIC ZOOLOG1 BNTOMOLOQY. 



Annual report of governor of Alaska on Alaska game law, L918, Biggs, jr 751 



A convenient method of handling large numbers of insects, Cushman 



The development of a portable insectary, Young 



Observations on the mode of action of contact insecticides, Moore 



Study of effect of storage, heat, and moisture on pyrethrum, Abbotl 752 



Report of entomologist, Hinds 



[Report on] entomology, Troop 752 



[Report on] division of /oology and entomology 



Notes from Tasmania. Littler 



Insects attacking the potato crop in ( ionnecticut, Britton :•.■••• ~'^ 



Some new enemies of greenhouse and ornamental plants in New Jersey, Weiss.. 



Insects of swamp rose mallow in New Jersey, Weissand Dickerson 754 



Medical entomology a vital factor in the prosecution of the war, Pierce 754 



Two new species of the Matt id genus Arenivaga, Caudell 754 



Three species of Anasa injurious in the North, Parshlev 754 



The "17-year locust " in 1919 : 



Life history and early stages of Calophya nigripi nnis, Weis and Nicolay 754 



The identity of Aphis circ< mndis, Baker 754 



Preparing for apple aphid outbreak, Cossard 754 



Eradication of poultry lice. Wells 



A note on the economic importance of Samia cecropia, Ainslie 



The bee moth or wax worm, Paddock 755 



