A Neiv Plan for constructing Greenhouses. 159 



naturally occurs during the months of October and November. 

 In spring, of course, these positions are reversed, the roots are 

 then placed in a colder medium than the branches. Leaves 

 are produced, which speedily drain the plant of its sap, hav- 

 ing no roots to supply the demand. Severe heading in must 

 then be practised, to secure a doubtful existence, dependent 

 upon the mutilation the roots have received, and subsequent 

 favorableness of the weather. I have planted many trees 

 both in fall and spring, have seen roots form without any 

 growth made, and consider fall planting the gain of a season 

 upon the future growth and welfare of the tree. 

 Baltimore, March 10, 1853. 



Art. V. A New and Economical Plan for constructing 

 small Gree7ihouses for groiving Plants in Winter. By 

 H. G. Davis, Esq., Millbury, Mass. 



Mr. Editor : — I wish to call the attention of your readers 

 to the arrangement of a greenhouse that I have had in opera- 

 tion for two winters ; and as that of 1851-2 was colder 

 than the majority of our winters, I consider it a sufficient 

 test of the adaptedness of the house to our climate. 



Its recommendations are, 1st, the cheapness of its con- 

 struction, where the situation of a building admits of attach- 

 ing one to it, or where a building is to be built anew ; 2d, 

 the expense of supporting it, as it requires no additional 

 heat, — thus saving the principal expense attending the culti- 

 vation of plants in a house devoted to the purpose. 



My dwelling house has a piazza upon its southern side, 

 facing a yard containing fruit trees, ornamental shrubs and 

 flowers. The building is some five feet above the gravel 

 walk, which is one foot from the base of a turfed embank- 

 ment ; this embankment is nine feet wide, and as high as 

 the bottom of the underpinning of the piazza ; the width of 

 the piazza is seven and one half feet. I took out the earth, 

 and walled up, from the base of the embankment, on the 



