. The book of the garden. Gardening. BOILERS AND PIPES. 249 the practice of raising vapour from water sprinkled on the soil, &c, which he very properly condemns, and lays it down as a rule, that wherever artificial heat is employed, all the requisite moisture should be vaporised by the heating apparatus, and by it only, he goes on to observe: " Various schemes have been devised for this purpose, amongst which may be mentioned the plan of making a part of the water circulate in open troughs, instead of closed pipes. This plan, however, and all the modifications of it, are open to the o
. The book of the garden. Gardening. BOILERS AND PIPES. 249 the practice of raising vapour from water sprinkled on the soil, &c, which he very properly condemns, and lays it down as a rule, that wherever artificial heat is employed, all the requisite moisture should be vaporised by the heating apparatus, and by it only, he goes on to observe: " Various schemes have been devised for this purpose, amongst which may be mentioned the plan of making a part of the water circulate in open troughs, instead of closed pipes. This plan, however, and all the modifications of it, are open to the objection, that all the impurities which by accident fall into these troughs or gutters may be carried by the circulation into the boilers, and, depositing themselves there, give rise to numerous unpleasant consequences. A much better plan is to cast a trough upon the circulating pipes, which has frequently been done upon a small scale, and attempted on a larger. It failed, however, for some time, in consequence of the tendency of any large excrescence upon the pipe to bend it in the act of ; At his sug- gestion, pipes with large troughs of this form, fig. 332, have been recently made, where the troughs con- tain 10 gallons of water in each length of pipe, so that one or more placed in a hothouse would furnish an abundant source of moisture, without abstracting it from the soil, and without affecting the purity of the circulating water. These troughs have the farther advantage of being entirely inoperative when left dry; whereas the open gutters depend on the perfectly close fitting of their covers.— Vide Rogers's opinion on the same subject, sect. Various Modes op Fig. Heating, &c. Fig. 333 The same excellent authority proposes to arrange his pipes as in the annexed fig. 333, " though," he observes, " with a view to the full effect of the radiant heat, and to the prevention of any greater com- munication of heat to the air than is unavoid
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
