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LOUDON'S ARBORETUM ET FRUTICETUM BRITANNTCUM. 
employed by Messrs. Henderson, Pine- Apple Place, which we may here again 
commend to the consideration of all who study neatness, efficiency, and economy. 
For those sorts of plants which only need shelter in frosty weather, frames of such 
a description will entirely supersede the use of glazed lights, and they can be very 
easily manufactured ; but they are quite as suitable for covering a glass roof, from 
which they will effectually prevent excessive radiation. "We hope it has here been 
plainly proved tohy an elevated covering is to be preferred, for there is nothing 
which we so much wish to avoid as dogmatical assertion, or which we so much 
desiderate, even on the most scientific subjects, as succinctness. Conduction being 
but a continuation of the radiating process, where it is allowed full operation, the 
disparity between the escape of heat from a covered and uncovered glazed surface, 
when the materials are in contact with it, is only one of time, and not of extent. 
LOUDON'S ARBORETUM ET FRUTICETUM BRITANNICUM. 
A slight notice of this invaluable work having appeared in our last volume, 
renewed advertence to it may seem supererogatory. At that time, however, we 
were imbued with the persuasion that every proprietor of landed property, or of 
the smallest ornamental estate, would, without exhortation from us, eagerly possess 
themselves of so essential a guide to all the practices of arboriculture. Having 
since ascertained that our expectations on this head were illusive, we are anxious 
farther to press it on the attention of our readers, satisfied that, if we should induce 
them to purchase, they will ultimately be led to acknowledge themselves highly 
benefited by the suggestion. 
We decidedly consider this our author's chef-d'oeuvre, as it leaves scarcely 
anything of vital moment yet to be desired on the important subject of which it 
treats. There is not a hardy tree or a shrub grown in British gardens but is here 
faithfully described, with the synonymes and remarks of all botanical writers, an 
account of its introduction, history, uses, culture, propagation, and the prices for 
which it may be obtained in different countries. A great mass of this information 
is from the extensive and varied resources which have been opened up to the 
author in the course of his laborious career ; but every work that bears reference 
to the objects under consideration, has been culled with the greatest judgment, for 
the purpose of collecting into one group all the observations and experience of 
individuals of every era since arboriculture was first regarded as an art. 
For persons of an imaginative turn of mind, and such as love to gather and 
cherish pleasing or even fanciful associations in viewing the productions of Nature, 
ample materials are afforded throughout this work. The most sublime and inter- 
esting allusions to trees in Sacred Writ, the choicest passages from the pages of 
our own and other poets, and numerous citations from polite literature, when 
having any connexion with the plants under discussion in the places where they 
