Progress of Horticulture for 1845. 9 



with the aid of a proper knowledge, plantations can be so 

 arranged as, at all times, and at every season of the year, to 

 present some new and changing scene — at one time gay with 

 flower.-?, at another brilliant with fruil ; again, fresh with the 

 deep green of summer, and then tinted with the purple, 

 scarlet, and varying hues of autumn. The eiTect of a land- 

 scape may be as much heightened by a judicious planting of 

 trees, as a parterre by the proper distribution of flowers. 



Our nursery collections are yet scanty in the supply of 

 hardy trees. The spread of a correct taste will create a 

 demand, and the demand will induce every ambitious nur- 

 seryman to add the hundreds of hardy trees and shrubs, 

 which we are now deficient of, to his collection. 



Garden Architecture. 



We have given, in our last volume, two excellent articles, 

 by our foreign correspondents, on the construction of forcing 

 pits and houses, and heating with improved boilers and tanks. 

 The subject is one yearly attracting more attention, from the 

 increasing number of greenhouses, &c., \vhich are annually 

 erected ; and we are desirous of giving every information 

 which will aid in introducing the most approved and eco- 

 nomical modes of heating, that individuals may be induced to 

 add the luxury of a greenhouse to every garden of the least 

 extent. 



The open tank system has quite failed, as we predicted it 

 would, in furnishing a medium of bottom heat ; the objec- 

 tions to it we have fully stated in an early volume of our 

 magazine, eight years since, when we tried the plan, before it 

 had ever been adopted in England. The steam arising from 

 the water, filled the soil with damp and deleterious salts, and 

 until a perfectly tight cover was added, it could not be made 

 use of to any advantage. To obviate this objection, in Eng- 

 land, the iron tanks of Messrs. Burbidge & Healy have been 

 introduced, and with good effect. 



Messrs. Hovey &. Co. have just put up in their large con- 

 servatory one of the boilers of Messrs. Burbidge & Healy, 

 and the experience of iwo or three weeks, proves it to be 

 so much more powerful and economical than the common 



VOL. XII. NO. I, 2 



