INDEX. 275 



Order defined, ..... 93 



Ovary, ...... 



Ovules, ...... 



Oil cake as manure, . . . . .198 



Philosophy, natural, ... . . 21 



Physics, \ * .$ . .21 



Prism, . f . ; >' . . 33 



Pyrogen, . , * r . . . 39 



Phosphorus, . . . . 66 



Phosphoric acid, *^ .$ . . .67 



Primary rock, . . . . . 78 



.Porphyry, . . . . .83 



Plants, divisions of _ *' ... 92 



Plants, classification of . .92 



Plumule, . ...*-. . 94 



Pistils, *^ . ' . " ,. * .97 



Perianth, . .' .' *' . / . 97 



Petals, . .. ' ./ '';-.- * . 97 



Pollen, . "." V'. ... 99 



Placenta, . V . ." . .99 



Pericarp, . "/ ;' * : . . . 100 



Parasitel, .* ' ? -* ^ '.. . . . 105 



Perennial roots, . " .* ;" . 105 



Pith, . . ; v* . ^, ' . . 107 



Parenchyma, . . . * . . 116 



Peduncle, . . . / ', / . .119 



Panicle, . . . ; ; , " , . 120 

 Plants, curious phenomena of . /; . ',' > . . 122 



Plants, locality of . . . ' . * ^ , .. 123 



Plants, diseases of . . -^, ' ^* , . 123 



Parhelia, . . . l .V * -^* 148 



Potassium, . . . .. * *7 . IQI 



Peat, . . . . . * . ] . 167 



Potter's clay, . . . : , ,* . 167 



Pipeclay, . . . ^ . * ^, " . 167 



Peat, composition of . . . -' . .168 



Paring and burning, . . . . 180 



Phosphate of lime, . . .. .193 



