. Cassell's popular gardening. Gardening. "--'ifj, . â .â -> />s.,,i'.', "l lis . ^-.; rwv. ..svt-'A' nearly as may be uniform hardness and quality. The land pickings, and general collections of builders' rubbish and effete brick- bats, &c., sometimes used for drains, are very inferior to chalk, flint, river or sea shingle of sufficient size, or the refuse or inferior stones of the quarries. These may be used of considerable size, especially towards the bottom of what are called rubble drains. The rough stones keep the water-course open, main- taining a free course
. Cassell's popular gardening. Gardening. "--'ifj, . â .â -> />s.,,i'.', "l lis . ^-.; rwv. ..svt-'A' nearly as may be uniform hardness and quality. The land pickings, and general collections of builders' rubbish and effete brick- bats, &c., sometimes used for drains, are very inferior to chalk, flint, river or sea shingle of sufficient size, or the refuse or inferior stones of the quarries. These may be used of considerable size, especially towards the bottom of what are called rubble drains. The rough stones keep the water-course open, main- taining a free course for the water as in the case of box, angle, or tile drains; while the smaller stones at succeeding elevations, and the yet smaller on the surface of the drain, act as percolators, and also as barriers to the passage of silt into the drains. To make security doubly sure against these blocking tendencies of the soil, a thick turf is often inserted over the upper layers (Si fine stones, or a thin covering of straw is placed over these or the tUes. Buried thus, the straw will last long enough to keep the soil out of the drains until it (the soil) has once more become so consolidated as to form an indestructible arch over the drainage material, which, though not impervious to water, is to the passage through of any sand or rig. 19.âBubble Drain. no other hard material abounds. They are fairly effective and durable, but are altogether out of char- acter and form for garden purposes. Turf Drains. â The same may be said of these, but they answer well in old meadows, where the turf is thick, fibrous, and strong. It used to be cut almost two inches thick and securely placed on the artificial ledge cut out for it near the base of the drain, the base section being made as narrow as possible, as in No. 1, Pig. 18. It is said on good authority that some of these drains have lasted sound and good for periods so prolonged as from twenty to thirty or even fifty years. By this it must
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Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1884
