Glendinnhig on Corhctt's Mode of Heating. 57 



only executed their work reasonably and well, but have always 

 exhibited the most anxious desire to finish it in the best manner. 

 The parties I allude to are Messrs. Turner and Walker, of 

 the Hammersmith Works, near Ball's Bridge, Dublin. The 

 one executes the metal work of the house, and the other the 

 hot-water apparatus. 



Richmoiid Hilli Kmgstowii, Dublin^ Dec. 1840. 



Art. II. Mr. Glendinning' s Opinion of Mr. Corbett's Mode of 

 Heating by Hot Water. By R. Glendinning. 



Mr. Corbett's discovery of circulating hot water in open 

 gutters, and its application to horticultural purposes, is the 

 most important invention in heating every description of forcing 

 and plant structure, since the first attempt of communicating 

 heat to plants by means of warm water. Mr. Coibett's plan 

 combines the simplicity of the good old level system with the 

 grand advantage of diffusing through the house, without trouble, 

 any quantity of moisture required, or entirely withholding it. 

 The circulation of the water in the gutters is quite as rapid as 

 by any other system, if not more so, even when left entirely 

 open. The invention is cj-ivested of all intricacy, as the water 

 may be exposed to full view from its leaving the boiler until its 

 return, and consequently never liable to go out of repair. Its 

 effectual application to every description of forcing-house is at 

 present without a parallel ; as, by the partial or entire removal 

 of any number of covers, an unvarying degree of moisture, 

 always governed by the temperature maintained, can, with the 

 greatest ease and accuracy, be communicated. This alone, to 

 practical men, will secure to it a decided preference. Red 

 spiders, thrips, and all other insects, will be readily subdued ; 

 and an atmosphere, at once invigorating and refreshing, at all 

 times maintained. During the late very severe weather, when 

 the diermometer was at 10°, it has proved to us its great 



n, Back path. 



b. Bark pit, SO ft. long in the 

 clear. 



c, Exterior pit for dung casing, 

 ' to revive the heat 

 d (l. Gratings to drains. 

 e. Stink-trap to drain. 



Fig. 18. Ground Plan of a Pit to be heated in Mr. Corbett's tnanner. 



superiority most satisfactorily. It is erected in a geranium-house 

 in our nursery ; and, by careful comparison with a number of 

 other modes of heating, our opinion of its excellence is very 

 strongly confirmed. It has also been thoroughly tested in a 

 pine-pit erected by us for a lady in this neighbourhood, similar 



