INDEX. 377 



PAGE 



Seeds, their nature . ..... 189 



, their channels of nutrition . . . . .89 



, on the direction of their radicle and germen during the process of vegetation 124 



, their vegetation injured in some instances by rich mould . . 1 15 



, their production tends to weaken the plant . . . .116 



, their non-production tends to prolong the life of trees . 84 



Seedling plants thrive better in spring than in autumn . . .91 



Seed-coats, generated wholly by the female parent . . . 177 



Seed-vessel, its office . . . .. . . .191 



Sensation not to be traced in plants . . . . . 163 



Shading of plants under glass . ..... 266 



Shallot, on its culture . . . . . . . 209 



Shelter from winds, its effect on trees . . . . . .163 



Shoots, their elongation and imperfect growth occasioned by damp heat during 



the night . . . . 216 



Siberian Crab . ..... 175 



Silver grain of wood . . . . . . 25 



, a substance similar to it in the cores of fruits . . 90 



Soil of old gardens injurious to seedling trees . . . . 178 



Solar-heat, importance of, in regard to the ripening of forced fruits . . 225 



Spade husbandry . . . . . . . . 323 



Spanish Chestnut timber, that of Oak liable to be mistaken for it . .100 



Specific gravity of timber felled at different seasons . . . 112 



of Oak . . . . . . .132 



of resinous wood . . . . . . 135 



Spiral tubes . . . . . . . . 86. 90 



Stems .......... 189 



of fruit-trees, beneficial effects of their being protected . .. . 287 



Strawberry plants on their preparation for early forcing . . . 280 



Strawberry . ....... 252 



, on its cultivation . . . . . 283. 290 



, production of a mule variety of . . . . 276 



, Yellow Chili . . . . . . . 285 



Stocks, on the effects of different kinds in grafting . . . .221 



, their adaptation . . . . . . . 222 



, the plum, its effect upon the Apricot . . . . . 272 



Succulent shoots, cause of their inclination towards the light . . 166 



Sulphur, flowers of, a remedy against insects . . . . .218 



Sycamore, specific gravity of its sap . . . . ..Ill 



TEMPERATURE, moderate variations of it necessary for vegetation . . 91 



, effects of its unequal distribution throughout the season . .173 



, effects of extremes of . . . . . . 303 



of forcing-houses . . . . . . . 225 



, effects of a very high one on some species of plants . . 238 



, an excessively high one sustained in dry air . . 216 



