10 Retrospective View of the 



boiler generally used, that it must eventually become exten- 

 sively adopted in all large buildings. As we intend to give 

 a drawing of it in a future number, we shall not now enter 

 into any detail respecting it. Mr. Buist has adopted it in 

 Philadelphia, and a house, 120 feet long, is warmed with one 

 boiler, at a slight expense for the winter. A boiler con- 

 structed in Boston is said to answer well ; and as it has been 

 lately put up in two or three houses around the city, we shall 

 endeavor to give some account of it soon. 



The plan of building graperies and greenhouses, as first 

 adopted here by Horace Gray, Esq., has proved so economi- 

 cal and excellent for the purposes of cultivation, that we 

 shall give a full account of it, with some engravings illustrat- 

 ing their construction. The plan is a curvilinear roof on 

 both sides, without any moveable sashes, but with ventilators 

 at top and bottom. Its neat appearance and cheapness of 

 construction must recommend it for general adoption, espe- 

 cially for what are termed cold houses, for the cultivation of 

 grapes. 



Commercial Gardening. 



Commercial gardening is just now in a very prosperous 

 condition. A continued demand for trees has kept every 

 nurseryman busily engaged, and the brisk business of the 

 past autumn is the best evidence of the advanced and ad- 

 vancing condition of horticultural improvement. 



It is gratifying to us to state, that the estate of the late 

 Mr. Manning has been so relieved by many friends, that, under 

 the management of his sons, the Pomological Garden will 

 long continue a memorial of the labors of its founder, and 

 a benefit to the public. The past year, no less than 240 

 varieties of pears were fruited in this collection. The ex- 

 tensive grapehouses of Mr. Allen in Salem, have been com- 

 pleted, and will soon produce an immense quantity of grapes 

 for the market. The specimens exhibited by him were very 

 numerous and the earliest forced ones very handsome. A 

 new establishment, principally for the sale of flowers, has 

 been commenced in this city by Messrs. West &- Putnam, 

 who have opened a depot in Boston for the sale of plants, 

 bouquets, &c. 



