200 Descriptions of various Modes of Heating by Steam, 



Miller's Nursery at Clifton, in front of one of the green-houses and 

 having a glass roof. Steam is admitted by a pipe three quarters of 

 an inch diameter, having perforations of about one tenth of an inch 

 at each foot in length, the extremity of the pipe being closed, 

 and it issues through the small apertures, filling the whole internal 

 area of the large pipe in which it is enclosed, imparting an equable 

 temperature to the whole extent of surface ; an effect which cannot 

 be obtained by applying steam in the common way, when but 

 a small increase of temperature is required : as the water imme- 

 diately in contact with the pipe where the steam is admitted would 

 absorb nearly the whole of its heat, till it arrived at a temperature 

 far beyond what could be allowed in a case of this kind. The 

 dimensions of the reservoir alluded to, are about three feet by three 

 feet six inches, and twenty feet long. The external pipe four 

 inches inside diameter, the condensed water from which is taken 

 away by a small syphon at the farther end. 



Heating the Atmosphere for Conservatories, Hothouses, fyc. 



Fig. 9, 10, and 11, Plate 7, represent a mode of heating water 

 in pipes by the agency of steam. 



It is well known that by the common hot-water apparatus, the 

 heating of an extensive and unconnected establishment of houses 

 by one fire is impracticable in most cases, but in the mode here 

 represented the extent of application is in a manner unlimited, 

 whatever be the number or situation of the houses requiring heat. 

 It likewise combines all the advantages of steam as a conductor of 

 heat with that of a bulk of water as a retainer. 



The first adoption of this mode (which the writer is aware of) 

 was in a forcing house belonging to Mr. Sturge near Bath. The 

 water-pipes are eight feet in diameter, and about twenty-eight feet 

 long. The steam-pipe of one inch diameter entering at the centre 

 of one end, and proceeding in rather an inclined direction to the 



