. Annual report of the Regents. New York State Museum; Science. 864 - NEW YOEK STATE MUSEUl^ The swamp from whicli tlie raw materials are ob1;;^ine(l sliows sections, from top to bottom, approximately as follows: .,_ , .^,- -^ , " ' Thickness Material '-/".? ^ ' - - '' in feet Muck ...,/.....,,.;.... 1;,: 2 Upper bed white marl . 4- - 1 Lower bed gray to brown marl 4 7 Sand ..-. , . -, ...... 0 1 Bliiisli clay 2 5 A# might be expected from the relative color of the marls, the material from the lower bed shows, on analysis, more organic matter than th,at from the upper bed, for which
. Annual report of the Regents. New York State Museum; Science. 864 - NEW YOEK STATE MUSEUl^ The swamp from whicli tlie raw materials are ob1;;^ine(l sliows sections, from top to bottom, approximately as follows: .,_ , .^,- -^ , " ' Thickness Material '-/".? ^ ' - - '' in feet Muck ...,/.....,,.;.... 1;,: 2 Upper bed white marl . 4- - 1 Lower bed gray to brown marl 4 7 Sand ..-. , . -, ...... 0 1 Bliiisli clay 2 5 A# might be expected from the relative color of the marls, the material from the lower bed shows, on analysis, more organic matter than th,at from the upper bed, for which reason more of it must be used, with the same amount of clay, than of marl from the upper bed. This distinction is -accompanied by other slight but rather constant differences in chemical composition, which have also to bo taken into account in the preparation of the cement mixture. _ Analyses of the raw materials follow. Those marked 1 and 3 are quoted by Cummings,"^ while 2 and 4 were recently furnished me by the company; Marl Clay 1 3 3 SiO.^ . .26 .26 '^^^^•^ \ .1 -21) FcgOg .....> .Oli CaC03 Mgt'O^ .38 . .4 .99 K2O SO3 Organic Water + loss It will be noted that the clay used here runs higher in lime than does any other used in the state, the nearest approach to the above analyses being shown by that of the clay used at Way- land, which carries a little less than 20^ of lime carbonate. 1 American cements, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
