Archive image from page 559 of A dictionary of modern gardening. A dictionary of modern gardening . dictionaryofmode01john Year: 1847 S TO 564 —♦— STO house to be ventilated, will be found in Mr. Hood's following table of the quantity of air, in cubic feet, discharged per minute, through a ventilator, of which the area is one square foot. Difference between temperature o _c B5 of room and external air. 5° 10° 15° 20° 25° 30° 10 116 164 200 235 260 284 15 142 202 245 284 318 348 20 164 232 285 330 368 404 25 184 260 318 368 410 450 30 201 284 347 403 450 493 35 218 306 376 436 486 521 40
Archive image from page 559 of A dictionary of modern gardening. A dictionary of modern gardening . dictionaryofmode01john Year: 1847 S TO 564 —♦— STO house to be ventilated, will be found in Mr. Hood's following table of the quantity of air, in cubic feet, discharged per minute, through a ventilator, of which the area is one square foot. Difference between temperature o _c B5 of room and external air. 5° 10° 15° 20° 25° 30° 10 116 164 200 235 260 284 15 142 202 245 284 318 348 20 164 232 285 330 368 404 25 184 260 318 368 410 450 30 201 284 347 403 450 493 35 218 306 376 436 486 521 40 235 329 403 465 51S 570 45 248 348j 427 493 551 605 50 260 367 450 518 579 635 The foregoing table shows the dis- charge, through a ventilator of any height, and for any difference of tempe- rature. Thus, suppose the height of the ventilator from the floor of the room to the extreme point of discharge to be thirty feet, and the difference between the temperature of the room and of the external air to be 15°, then the dis- charge through a ventilator one foot square, will be 347 cubic feet per mi- nute. If the height be forty feet, and the difference of temperature 20°, then the discharge will be 465 cubic feet per minute. Bark or Moist Stove.—Mr. Loudon gives the following design and descrip- tion of a moist stove, warmed on the old plan of deriving heat by the com- bined agency of bark and flues. In- stead of a stage in the centre it has a pit, which may be from two and a half to four feet deep, according as bark or leaves are to be used, the latter mate- rial requiring the greatest depth. It is Fig. 160. commonly surrounded by a thin brick wall: but planks of stone, or plates of slate or cast-iron, are to be preferred. The roof, when necessary, may be sup- ported by iron columns from the middle of the pit, a. ' Shelves may be placed against the back wall, b, and occasionally a nar- row-leaved creeper run up the roof, c. We may add, that houses of this de- s
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