372 INDEX. 



PAGE 



Medullary processes . . . . . . . 102 



originate in the bark . . . . .103 



originate not from the medulla . . . 121 



improperly so termed . . . . . 1 70 



Melon, theory respecting vegetation illustrated in its culture . . .189 



, observations on its culture . . . 191.313 



, effect of extremes of temperature on . . . 238 



' ? new and improved method of cultivating it . . . 267 



, means for preserving its roots in shifting . . . 305 



, description of a pit for the . . . . .261 



, Persian varieties of, on their cultivation . . . .314 



, treatment of various Persian varieties noticed . . . 329 



, Dampsha . . . . . . . 330 



, green Hoosainee ....... 329 



, striped Hoosainee ... ... 329 



, Ispahan ....... 315. 330. 331 



, Rock Canteloup ........ 270 



, Salonica ........ 193 



Mentha piperita . . . . . . . 270 



Metallic Oxides, their effects on vegetation . . . . .36 



Mildew .... . . . . .28. 186 



, its cause ........ 188. 206 



, its nature ........ 204 



, on its prevention in particular cases ..... 204 



, means of its prevention ...... 206 



induced by disease in plants . . . . . 208 



communicated by the berberry-tree . . . 205 



- of wheat ..... . . 219. 220 



Mint, experiments with its leaves ...... 169 



, roots produced by its leaves . . . . . . 270 



Moisture, probability of its transmission from the leaves to the roots by the 



alburnum ........ 135 



in hot-houses ........ 303 



Motion of trees, effect of upon the circulation of sap . . 99 



in a particular direction, its effect on the stems of trees . . . 109 



, its effect on the vegetation of seeds . . . . .125 



Mule-birds . . . . . . . . . 253 



Mule-plants, account of . . . . . . .275 



Mushrooms, minuteness of their seeds . . . . . 205 



NECTARINE-TREE, under high temperature ..... 239 



, the Imperatrice, on the means employed in raising it . . 339 



Nettles in a green state employed as a manure ..... 194 



OAK, its greater duration in northern climates . . . 84 



, remark on the absence of tap-roots in the . . . . 129 



