276 INDEX. 



Peat as manure, . . . . .198 



Pasture, improvement of the soil by . 202 

 Pasture, temporary ..... 202 



Pasture, permanent .... 202 



Power defined, . . . . .230 



Pulley, ...... 234 



Q 



Quartz, . . . . . .85 



B 



Rarity, . . . . . .27 



Resin, ...... 61 



Rocks, classification of . . . .77 



Rocks, aqueous ..... 80 



Rocks, volcanic ... . . .80 



Rocks, plutonic ..... 80 



Rocks, rnetamorphic . . . . .80 



Rock salt, ..... 88 



Radicle, . . . ... .94 



Rain tables, . . . . . 136 



Rotation, courses from Colman, . . 187 



Receptacle, . . . . . 97 



Radicle, ...... 101 



Root, 102 



Ramose roots, . . . , .103 



Root, functions of . . . . 106 



Respiration, . . . . .118 



Rachis, . . . . . 119 



Rain, . . . . .135 



Rain, its cause, . . . . . 125 



Rain, its quantity, &c., . . . .135 



Rainbow, . . . . . 148 



Rainbow, inverted . . . . .148 



Ribbing, . . . . . 178 



Rotation of crops, . . . . .184 



Rotation, objects of . . . . 185 



Rotation, courses of . . . . .188 



