INDEX. 



PAGE 



ALBURNOUS vessels of trees, on their inverted action 130 



substance descends from the leaves, and is secreted by the inner 



bark H8, 151 



tubes are generated within the interior surface of the bark ... 145 



, their, origin and office 148 



Alburnum, first formation of its vessels 117 



, principal substances of which it is composed 139 



of trees, on its origin and office 148 



, its formation affected by shading the leaves 96 



a (lords substance for both roots and buds 119 



, its capacity for generating new bark 139 



, its power of carrying fluids in various directions .... 134 



, inconvertibility of bark into 143 



, its vessels^best adapted for carrying the sap upwards . 155 



, its deposition increased by the motion of trees by wind . . . 337 



, its formation in the leaf-stalk 102 



, effect of abrading its surface 144 



is killed by exposure to the air 103 



, substance by which it is attached to the bark 146 



affected by temperature and moisture 101 



: , arrangement of its tubes in the horse-chesnut . . . . 148 



of the oak, quantity of water contained in it 171 



Alligator or avocado pear . . 240 



Almond hybridized with the peach 252 



Almond-tree, recommended as a stock for the peach and nectarine . . . 209 



Amaryllis Sarniensis 236 



, on its cultivation 292 



Ammonia ............. 298 



Ammoniacal gas destructive to insects 245 



Ampelopsis quinquefolia 164 



, its tendrils closely resemble those of the vine . . 165 



Animals, on their hereditary instinctive propensities 358 



