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NJDEP - NJGS - First Annual Report of the Geological Survey of the ...

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I89Chloride <strong>of</strong> magnesium, _Chloride <strong>of</strong> iron, , traces•2. Soluble in chlorohydrie acid.Lime,• 9.71 e_p_.dl.,o_bon.t,<strong>of</strong> lime, 17._ per CCnL.Correspo_dir1_ to c_rbonale}ffsgnesia, . 0.42 <strong>of</strong> m_,e_i_,z._ perc_nt.Carbonic acid, .... 7.25Combined water,Organic acids,l by direct de-} termination, 3.19Sesqnioxide <strong>of</strong> iron, mean <strong>of</strong> twodeterminations2 . . ,1.28Alumina, mean <strong>of</strong> two determinations,. 2.12Phosphate <strong>of</strong> lime, . . . 0.803. Insoluble in ehlorohydrio acid..Amorphous silica, 1:21Organic matter, humus, decaycdvegetable tissues, etc., 5.52'Coarse sand i with debris <strong>of</strong> ]minerals containing silica,alumina, oxide <strong>of</strong> iron, and 66.57magnesia,consideredwhich may beas inert matterIron pyrites,Hy_oscopie water, 2.08'Nitrogen, undetermined.100.25A most remarkable and wholly unexpected result &thisanalysis is <strong>the</strong> detection <strong>of</strong> @on pyrites in <strong>the</strong> marl, and fromtim fitet <strong>of</strong> finding'it also in ano<strong>the</strong>r <strong>of</strong> <strong>the</strong> marls whose analysisis given below, thc presumption would seem to be, that itis probably present in many <strong>of</strong> <strong>the</strong>se deposits• Far<strong>the</strong>r examinationswill decide this point. In <strong>the</strong> mean time, its presencein <strong>the</strong>se two marls can only be looked upon as highly favorableto <strong>the</strong>ir availability as fertilizers.From <strong>the</strong> presence <strong>of</strong> an excess <strong>of</strong> carbonate <strong>of</strong> lime, it isimpossible that any <strong>of</strong> <strong>the</strong> pr?tosulphate <strong>of</strong> iron, formed by <strong>the</strong>NEW JERSEY GEOLOGICAL SURVEY

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