THE 



GARDENER'S MAGAZINE, 



SEPTEMBER, 1841. 



ORIGINAL COMMUNICATIONS. 



Art. I. Dr. Arnott's Stoves applied to the Heating of Plant-houses. 

 By W. H. Baxter. 



Since the egiquiry respecting these stoves was inserted in the 

 Gardener's Magazine, vol. xv. p. 94., they have been adopted 

 here, in a conservatory vi^hich was then undergoing repair, and 

 also in a new greenhouse which was erected soon afterwards. In 

 the conservatory they have been worked two winters, and in the 

 greenhouse the past winter only ; but as they have, in both in- 

 stances, received very constant attention, with a view of ascer- 

 taining their merits, &c., in this particular application, I think 

 I may hope to give you a pretty correct and impartial idea of 

 their fitness for the purpose, by stating the description and extent 

 of the houses in which they are placed, the size and kind of the 

 stoves in use, with the average consumption of fuel in severe 

 weather, and also a register of the thermometer in the open air, 

 in the greenhouse, and in the conservatory, for a certain time. 



The conservatory is a large substantial stone building, with 

 nine large sash windows in the frontage, which have inside 

 shutters ; and the glass span-roof is also sheltered in some degi'ee 

 by a parapet wall, which rises about 2 ft. above the gutters. It 

 is 56 ft. in length, and 21 ft. in height, and contains about 

 1 7,200 cubic feet of air. The greenhouse, being a new erection, 

 is, with the exception of the back wall, entirely of framework 

 and glass, and has had no artificial shelter. It is 48 ft. in length, 

 and contains about 7,500 cubic feet of air. 



In each house there are two stoves, with thermometer regu- 

 lators ; they are made of strong sheet iron of these dimensions : 

 height 2^ ft., length from side to side 3 ft., width from front to 

 back If ft. On the top of each is kept a good supply of water 

 in zinc troughs. In both houses the stoves are similarly placed, 

 being set back 1 ft. from the face of the back walls in recesses 

 cut to receive them, at distances from each other of one third the 

 entire length of each house. Cast-iron pipes carry off the smoke, 

 and terminate in a chimney in the centre of the back wall of each 

 house. In the conservatory, these pipes project from the wall, 

 but in the greenhouse they are embedded in it, which is the only 

 difference in the settina; of the stoves in the two houses. 



By frequent attention, and a good supply of coals, to the 

 1841. — IX. 3cl Ser. f f 



