. Journal. ry-ing walls. The caliche is extracted according to theShankslixiviating system, and wdien the solution is at110 Tw. it is allowed to settle for a short time, and thenis run oil to the crystallisation tanks at a temperature of240° I. The crystallised nitrate, after the mother-liquorhas drained away, is transferred to drying lloors, whereii becomes perfectly dry in the topical sun, and it is thenIdled into sacks for export. The cost of the machinery,plant, and construction amounted to £110,000. For thenight work, two 6000 candle-power arc lights are paper is accompanied by d
. Journal. ry-ing walls. The caliche is extracted according to theShankslixiviating system, and wdien the solution is at110 Tw. it is allowed to settle for a short time, and thenis run oil to the crystallisation tanks at a temperature of240° I. The crystallised nitrate, after the mother-liquorhas drained away, is transferred to drying lloors, whereii becomes perfectly dry in the topical sun, and it is thenIdled into sacks for export. The cost of the machinery,plant, and construction amounted to £110,000. For thenight work, two 6000 candle-power arc lights are paper is accompanied by drawings showing arrange-ment of plant.—G. II. B. A New or Improved Method of Manufacturing theFluoride, or Double Fluoride, of Aluminium withSodium or Potassium. L. A. Groth, London. From R,Gratzel, Hanover. Eng. Pat. 156, January .>, 1885. Solutions of 1 equivalent of aluminium chloride and (5 equivalents of an alkaline fluoride are mixed together. Aluminium fluoride is precipitated, and an alkaline. bed is found nearer to the sea coast than 15 miles, andthe furthest beds are distant 00 miles. The Ramirezcaliche is plentiful and easy of extraction; it contains51 per cent, nitrate of soda, 26 per cent, common salt,(i per cent, sulphate of soda. 3 per cent, sulphate of m inesia, and It percent, insoluble. The figure shows theposition of the caliche in the ground, and the method ofobtaining it. A shaft, about one foot in diameter, issunk, into which a boy is lowered, who forms a cone-shaped recess in the earth at the bottom of the caliche,which is charged with a slow-blasting p» der, and ignited by a fuse. This causes a dull explosion, loosening the ground around the shaft for a radius of ten yards. Theproduction of nitrate of soda has been developed withgreal rapidity since 1869, only 6000 tons having been ex-ported in 1845. The production increased by degrees upto tons in 1850. and in 1SS3 the exportation chloride remains in solution. When a larger proportionof a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
