Culture of Taxodium sempervirens. 485 



give the large mnge of metallic forcing houses at Woburn 

 Gardens, in England, which are heated on this simple plan ; 

 each house, or division of the range, being supplied with a 

 separate apparatus and boiler. The boilers in this case are 

 merely square boxes, open at top, but each having a wooderi 

 cover which fits tightly on the edges. The circulation is so 

 perfect that no steam is generated, — the water, therefore, 

 never reaches the boiling point. These apparatus had been 

 at Avork for many years previous to our living there, without 

 getting out of order, or in need of repairs, and at that time 

 were working as well as when they were erect&d. 



Though apparatus of this form are suitable under the 

 general arrangements of horticultural structures, there are, 

 nevertheless, some circumstances which require their modi- 

 fication, and some others under which they are quite inappli- 

 cable, to which, in connection with the misapplication of the 

 principle, we will subsequently advert. 



Boston, Oct. 15, 1850. 



( To be contmued. ) 



Art. II. Observations on the Culture of Taxodium sempei^- 

 virens. By M. Desportes, of M. Andre Leroy's Nursery, 

 Angers, France. 



Will you permit me to add some observations on the 

 manner of growing this species, to those you have already 

 published, respecting the Taxodium sempervirens, in the 

 August number of your estimable Magazine. 



Indeed, I do not know any tree in the family of the Conif- 

 era3, the growth of which is such as that of this Taxodium. In 

 1845, M. Andre Leroy, of Angers, received two plants of this 

 splendid evergreen tree ; he planted them in the open air in 

 his large and beautiful nurseries, without giving them any 

 more care than other hardy evergreens. One was in a 

 heath soil, (terre de bruyere,) and the other in a loamy soil. 

 The first is now twenty-four feet high ; the divergent 



