INDEX. 



PAGE 



Acalypha Virginiea 180 



Acknowledgments 10 



Acquisition of atmospheric nitrogen 114 



Acquisition of atmospheric nitrogen by plants, bibliography 131 



Adulterated milk, detection of 92 



^Ecidium grosularire 184 



Alopecurus pratensis 184 



Amarantus spinosus 184 



Amaranth, thorny 180 



Andropogon f urcatus 1*4 



Andropogon scoparius 184 



Anthemis cotula 180 



Anthomj'iid 170 



Authrenus Scrophularia? 178 



Apetalous peppergrass 183 



Apple-tree borer, round-headed 178 



Apple-tree tent-caterpillar 173 



Aristate plantain 180 



Asclepias cornuti 180 



Atmospheric nitrogen, acquisition of 114 



Automeris io 177 



Babcock test 61 



Babcock test, apparatus used 63 



Babcock test, method of making 66 



Bean weevil 17S 



Beard-grass 184 



Beech-bud insect 1 74 



Black or hair mold 184 



Blighting of maple leaves 181 



Blue vetch 179 



Box experiments with phosphoric acid 2(1 



Breeding house 98 



Bristly buttercup 1 79 



Brooding houses 101 



Brown-tail moth 175 



