. The book of the garden. Gardening. 518 MISCELLANEOUS GARDEN STRUCTURES. one-fourth part of the water which escapes by a simple aperture of the same diameter. The cohesion of the fluid particles is di- minished by heat, which, when increased 100°, nearly doubles, in certain cases, the ; The quantity of water discharged by pipes of different diameters, and under different heads of water, may be found by multiplying the area of the pipe in inches by the square root of the head of water, or the vertical height in feet, and that product by The friction in small pipes is pr
. The book of the garden. Gardening. 518 MISCELLANEOUS GARDEN STRUCTURES. one-fourth part of the water which escapes by a simple aperture of the same diameter. The cohesion of the fluid particles is di- minished by heat, which, when increased 100°, nearly doubles, in certain cases, the ; The quantity of water discharged by pipes of different diameters, and under different heads of water, may be found by multiplying the area of the pipe in inches by the square root of the head of water, or the vertical height in feet, and that product by The friction in small pipes is proportionably greater than in larger ones; but this is not very gene- rally regarded in practice. The quantities of water discharged in a given time, from different sized pipes, the head of water being the same, are to each other nearly as the area of the outlets. Liquid manure tanks are of such great importance to all gardens that no one should be without them ; and their situa- tion, as well as that of all other tanks or cisterns, should be sufficiently elevated, that the water may flow from them throughout all the garden by its own gravity, in pipes laid for the purpose. By this arrangement the expense of pumping will be saved. The advantage of liquid manure applied for irrigation has been exemplified in a most complete manner in the gardens of the Marquis of Tweeddale, at Yester House. The tank from which the supply is obtained is placed in the farm- yard, somewhat elevated above the gar- den. This tank contains 5000 gallons. The liquid manure is from thence con- veyed to the garden, a distance of 900 yards, in earthenware pipes. In the centre of each quarter of the garden is placed a tank capable of holding 500 gallons ; and from these, during the last year, no less than 32,000 gallons have been used, with the most marked effects. We should also mention that liquid manure tanks are attached to the hothouses, and heated by hot-water pipes running through them, so as to be a
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
