. An encyclopædia of agriculture : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and of the cultivation and economy of the animal and vegetable productions of agriculture. th turf or mud, in whicha lew holes are pierced to admit the passage of the smoke. 3871. Machines for pounding limestone have been erected, but the effect of the powder so obtained,both as a manure and for cement, is so much inferior to that of burnt lime, that they have long since beengenerally laid aside. 3872. Salt is procured from rocks, springs
. An encyclopædia of agriculture : comprising the theory and practice of the valuation, transfer, laying out, improvement, and management of landed property, and of the cultivation and economy of the animal and vegetable productions of agriculture. th turf or mud, in whicha lew holes are pierced to admit the passage of the smoke. 3871. Machines for pounding limestone have been erected, but the effect of the powder so obtained,both as a manure and for cement, is so much inferior to that of burnt lime, that they have long since beengenerally laid aside. 3872. Salt is procured from rocks, springs, and from the sea. In Chester, parti-cularly in the neighbourhood of Northwich, the salt works are very extensive. Greatquantities are got in the solid form, but not sufficiently pure for use. In this state it isconveyed from the mines to the Cheshire side of the river, nearly opposite to is at this place dissolved in the sea-water, from which it is afterwards separated byevaporation and crystallisation. There are also in the same district salt works, at whichthe salt called Cheshire salt is extracted from brine. These works are described veryintelligibly by Dr. Holland, in The Report of Agriculture for the County of Book II. MARINE FISHERIES. f29 Considerable salt-works are carried on in Scotland, and in the northern counties ofEngland on the sea-coast, by the evaporation of sea ivater. At Lymington, in Hampshire,the sea-water is evaporated to one sixth of the whole by the action of the sun and works in which the sea water is heightened into brine are called sun-works, or out-works. These are constructed on a flat down or oozy beach, within a mole, which israised, if necessary, to keep out the sea; there is a large reservoir, or feeding pond,communicating with the sea by a sluice, and adjoining to this reservoir a long trench,parallel to which there are several square ponds, called brine pots, in which the water isevaporated to a strong brine,
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1871
