108 Utility of ArnoWs Stove in Green-houses. 



heat, I had built at the other extremity of the house a common 

 brick flue, 20 ft. in length, in case of exigency. I will now give 

 the result of my observations. 



During the frost of the 8th and 9th instant, with the assist- 

 ance of one hour's heating of the flue in the evening with 

 brushwood, the thermometer was kept up to 50°, and, of course, 

 the frost completely excluded. Still, wishing to ascertain with 

 greater exactitude the capabilities of Arnott's stove, I have had, 

 during the sharp wind frost of to-day, nearly 30 ft. of the house 

 next the stove partitioned off by mats, so as to give me a small 

 green-house, 30 ft. long, 12 ft. wide, and 10 ft. high. In this 

 house, then, has the stove given all day, with a moderate fire, 

 and the consumption of not quite a peck of coke, from 50° to 

 60° of heat. To take off the arid and rather harsh nature of this 

 heat, I have had a zinc pan of water, 2 in. deep and 18 in. square, 

 placed on the stove ; the evaporation of which gives all the 

 softness and moisture that can be wished for. 



It must be borne in mind, that, in this trial, 9 ft. of the glass 

 roof out of 1.5 ft. has been covered with double mats, as is usual 

 in severe frosts with all green-houses. At this moment, 8 p. m., 

 the thermometer, in the open air, is at 28°. In the house of 

 the before-mentioned dimensions, heated by Arnott's 18-inch 

 stove, it is at 60°. 



I hope I have now said enough to convince plant-growers, 

 that for small green-houses, or even for moderate-sized ones, 

 this stove will effectually keep out frost, which, of course, with 

 green-houses, is all that is required. For plant amateurs, more 

 particularly those who do not keep a regular gardener, it is 

 invaluable; for the little attendance required can be given by a 

 maidservant. No overheating can take place, and no danger 

 to buildings is incurred ; and, if the simple prevention is taken, 

 of sprinkling the inside of the stove, when it is cold, with water, 

 to lay the dust, preparatory to cleaning it out, not the least 

 particle of dust escapes. This is a great advantage, as all other 

 stoves give so much dust, as totally to unfit them for the inside 

 of plant-houses. To nurserymen and dealers in green-house 

 plants, this stove is indeed a boon, for what numbers of lovers 

 of green-house plants have been deterred from undertaking 

 their cultivation, owing to the daily and nightly care required 

 during frost, to keep brick flues regularly heated ; and some- 

 times, owing to the great expense of fuel, and the calculation 

 that the frost would not be severe, a fire has not been lighted 

 some nights at the end of winter, and then all the previous care 

 has been destroyed by the admission of frost to the plants. Now, 

 with Arnott's stoves, any pit or large frame may be made frost- 

 proof; and, as the consumption of fuel is so trifling, a fire may 

 be lighted every night, and the expense not felt. Some caution 



