. Discovery. Science. DISCOVERY 183 had lain so many days under the sod, corruption had not approached him, and (what strangely affected all of us) his lips and chin were mantled with a swarthy ; The Master returned for one brief moment to life, and then sank into that eternal sleep which he had simulated for over a week. Modem Industries—11. Lime and Whiting Manufacture in Lincolnshire By R. C. Skyring Walters, , Assoc. In a previous commimication some of the Great Chalk excavations at Barton-upon-Humber were described in connection with the Portland Cement Industry
. Discovery. Science. DISCOVERY 183 had lain so many days under the sod, corruption had not approached him, and (what strangely affected all of us) his lips and chin were mantled with a swarthy ; The Master returned for one brief moment to life, and then sank into that eternal sleep which he had simulated for over a week. Modem Industries—11. Lime and Whiting Manufacture in Lincolnshire By R. C. Skyring Walters, , Assoc. In a previous commimication some of the Great Chalk excavations at Barton-upon-Humber were described in connection with the Portland Cement Industry. It is now proposed to describe some quarries, also very large, " Paramoudras," or in the form of regular layers which can be traced all round the quarry. The origin of chalk is now well known ; that is, it is an assemblage of the shells of minute marine organisms and is comparable to, though not necessarily identical with, the ooze or mud found beneath the Atlantic to-day. The origin of flint is verj^ obscure. An old geologist once was so hardy as to say that flint was a molten lava that had thrust its way out from the centre of the earth—how it arranged itself in such regular layers was difficult to explain ! Modem geo- logists and chemists affirm that flint is the siliceous (or sandy) component of chalk which has separated out into layers for some unknown reason ; a recent sug- gestion being that the whole mass of chalk was once in a state of saturation with a solution of sOica diffused through it. The silica separated itself into bands of flint, absent in the " Lower " but becoming more numerous towards the " Middle " and " Upper " chalks. A striking analogy to this theory may be obtained by inserting certain chemicals in a test-tube. i^^ ^ ^y ^^ I.—GEXERAI, VIEW OF .\ - MIDDLE CHAEK " QUARRY. situated four to six miles south of the Humber. Here the chalk comprises what geologists call the " Middle " Chalk, which
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