CONTENTS. m 



AGRICULTURAL BOTANY. 



Page. 



Methods in plant histology, Chamberlain 727 



[Report on physiological and pathological studies with plants], Hostermann . . . 727 



The pollen-presentation mechaiaism in the Composita?, Small 727 



Quantitative examination of elements of wood of trees, Dixon and Marshall . . . 727 



Formation of nodules, Giltner and Brown 727 



The daily march of transpiration in a desert perennial, Shreve 728 



Foliar transpiring power as an indicator of permanent wilting in plants, Bakke . . 728 



Continuous automatic registration of transpiration, Robertson and Wilkie 729 



The osazone method of locating sugars in plant tissues, Mangham 729 



Migi'ation of reserA'e material to the seed in barley, Beaven 729 



Distribution of nitrogen in seeds of Acacia pycnaniha, Petrie and Chapman 729 



Action of radium and radio-activity on germination, Agulhon and Robert .... 730 



Inhibition and correlation in regeneration of Bryophyllum calycinum, Loeb 730 



The determination of additive effects, Osterhout 730 



Acid accumulation and destruction in large succulents. Long 730 



Why certain plants are acrid, Lazenby 731 



The study of plant enzyms, particularly with relation to oxidation, Hall et al. . 731 



Studies in permeability. — I, Exosmosis of electrolytes, Stiles and Jorgensen. . 731 



Apparatus for measuring conductivity of electrolytes, llibbard and Chapman. . 732 



[Report of the research assistant in plant physiology], Hibbard 732 



The agar shake for detection of members of coli aerogenes group, Giltner et al. . 732 



Factors influencing longevity of soil micro-organisms, Giltner and Langworlhy . . 732 



The vitality of seeds biu'ied in the soil, Beal 732 



Breeding experiments with CEnotheras, Bateson, Keeble, and Gregory 732 



FIELD CROPS. 



Cereal experiments in Maryland and Virginia, Stanton 733 



Department of farm crops, Robb 734 



Aberdeen substation, Aicher 734 



Report of the division of farm crops, Shoesmith 735 



Agronomy 735 



First annual report of Vivian experiment and demonstration farm, Hume et aL 735 



[Farm crops] 735 



Farm crop report, Stookey 736 



Cover crops for Porto Rico, Ivinman 736 



Thinning experiments with potatoes, Whipple 736 



Seed inspection 736 



Weeds, Arthur 736 



HORTICULTURE. 



Hotbed construction, Sprague 737 



Commercial grading, packing, and shipping of cantaloups. More and Branch . . 737 



The tomato, Rovetta 737 



Orchard and nursery inspection laws of the different States, Ayers 737 



Influence of low temperature on fruit growing in New York State, Chandler. . 737 



[Report of horticultural investigations] 737 



[Report of the] department of horticulture, Vincent 738 



Dusting and spraying experiments with apples, Reddick and Crosby 738 



Blight-resistant roots. — The first step toward pear blight control, Wisker 739 



The taxonomic value and structure of the peach leaf glands, Gregory 739 



Cost of a peach orchard, Hayden 739 



Picking, pacldng, handling, storage, and transportation of peaches, Meeking. . 739 



Size grades for ripe olives, Bioletti 740 



Results of reconstitution in Sicily, Paulsen 740 



Mulching the citrus orchard, Fessenden 740 



Bud sports in agriculture, Pomeroy 740 



Notes on the budding of cacao on an estate scale in Trinidad, Freeman 740 



Diseases and pests of the coconut in Netherlands, India, Keuchenius 740 



Pecan culture, with special reference to propagation and varieties, Reed 740 



Intensive cultivation of ornamental plants, Gajon 741 



CUmbing plants, Watson 741 



The daffodil yearbook, 1915 741 



The amateur orchid cultivators' guide book, Burberry 741 



The home grounds, Davis and Curtis 741 



A historical sketch of the Royal Botanic Gardens, Peradeniya, Macmillan 741 



