PREFACE. yii 
cultivation of Liquorice, Rhubarb, Dyer's Madder, Weld or 
Dyer's Weed, Fuller's Teasel, Sea Kale {Crambe maritima). 
Cork-tree, Manna, Ash, Tanner's Sumack (^Rhus Coriaria), 
Paper Mulberry, Mulberry-trees for feeding Silk-worms, (and 
care of the insects,) with every other plant, not already common, 
which appeared to me of sufficient importance, either in a 
commercial, manufacturing, or ornamental point of view, or as 
affording any of the luxuries or necessaries of life, have been 
treated of with due attention: and in order to accommodate the 
Agriculturist, I have given a classical catalogue of the most 
important and valuable grasses and other plants used in rural 
economy; and likewise pointed out the particular kind of soil, 
in which each plant cultivated as a grass, or exclusively on 
account of its foliage, has been found, upon repeated trials, to 
succeed best. 
From an experience which I have had of near thirty years 
in PRACTICAL GARDENING, on a general and extensive scale; 
the particular pains which I have taken, not only to designate 
the necessary work of every month, but also the best methods 
of performing it; the avoiding of all unnecessary repetitions, 
so frequent in works of the kind, in order to render it as full 
of important matter as possible; the assiduous endeavours to 
make it useful in every state of the Union, and to induce an 
association of the science of Botany with practical horticulture, 
without which the latter can never be so advantageously con- 
ducted; it is hoped that this will be found to be the most useful 
and valuable Gardener's Calendar hitherto published in 
any country, but more particularly so to the citizens of the 
United States, for whose use it has been written, and to whom 
it is respectfully inscribed by the Author. 
BERNARD M'MAHON. 
Philadelphia. 
