ADDITIONAL OBSERVATIONS ON ARNOTT's STOVES. 151 



fact destroys the necessity of grafting in this way ; the Pereskia is 

 incapable of furnishing a sufficient supply of nutriment to its graft, 

 and the graft is obliged to use its own power of emitting roots to 

 escape starvation. Epiphyllum truncatum does well on Pereskia. 

 E. speciosum grafted on strong plants of Cereus speciosissimus, 

 turned out in conservatories, grows and flowers freely, making a fine 

 contrast with the flowers of its stock, both expanding at the same time. 

 E. Jenkinsonii and its allies also do well in the same way, but being 

 strong growers are not so fit, nor do they require a foreign stem to 

 lift them into notice. Opuntia Brasiliensis, Cereus hexagouus, and 

 other strong growing sorts, are used as stocks, but it is a pity to cut 

 off the head of a plant for the purpose of producing a monster in- 

 capable of exciting pleasurable sensations, and thus impairing the 

 enjoyment of the garden." Z. 



ARTICLE VII. 



ADDITIONAL OBSERVATIONS ON ARNOTT'S STOVES. 



BY A FLORIST, BOSTON, LINCOLNSHIRE. 



I sent you a few months ago a slight account of my brick Arnott's 

 Stove ; in the next number a .correspondent has taken notice of it, 

 and says, " He is perfectly convinced, it is not adapted for such a 

 purpose, (but hopes he will be excused saying so.)" Now I beg to 

 assure him that I excuse him with the greatest pleasure, but hope in 

 return he will excuse me if I again state that I am perfectly satisfied 

 with the result of last winter's experience. In the number for May, 

 a correspondent wishes to have a detailed account of the mode of 

 constructing the stove, which I have great pleasure in giving. As I 

 cannot see that any end would be gained by giving my address, I 

 shall refrain from doing so at present. The stove is two feet by 

 seventeen inches square and three feet high, built of common bricks, 

 edgeways, each course tied together with iron hooping to prevent the 

 stove bursting. The pan B is of fire-bricks, with a grating at the 

 bottom. There is an open space, F, between the fire-place and the 

 outer wall, which, together with the slow radiation of the bricks, 

 prevents the plants being too hot at a foot distance. The door, C, 

 is air-tight, and fits better without hinges ; the lower one, D, is the 

 same, but with valves to regulate the supply of air ; the chimney, E, 



