. The American florist : a weekly journal for the trade. Floriculture; Florists. SECTION OF CRAia & SON'S NE'W CARNATION HOUSES. Coal. IDflivered by Prof. H. Haaselbring, nf the Dni- vprsity of Ohicaeo, before the Chicago Florists' Club, April 20, To enable us to under- stand the difierences in the various kinds of coal it will be necessary to dis- cuss briefly the origin of this mineral fuel, and the principal changes which occurred in its formation. All coal is of vegetable origin. It consists principally of sunken compressed peat bogs. During the car- boniferous era the area now o
. The American florist : a weekly journal for the trade. Floriculture; Florists. SECTION OF CRAia & SON'S NE'W CARNATION HOUSES. Coal. IDflivered by Prof. H. Haaselbring, nf the Dni- vprsity of Ohicaeo, before the Chicago Florists' Club, April 20, To enable us to under- stand the difierences in the various kinds of coal it will be necessary to dis- cuss briefly the origin of this mineral fuel, and the principal changes which occurred in its formation. All coal is of vegetable origin. It consists principally of sunken compressed peat bogs. During the car- boniferous era the area now occupied by coal fields formed an arm of the sea which once occupied all the territory no w known as the Mississippi valley. On the shores of this sea was a vegetation of great luxu- riance consisting of plants resembling gigantic rushes, clubmosses and selagin- ellas. This rich growth crept out over the water, forming enormous areas of matted floating vegetation very much like our present floating peat bogs. These masses were graduallv pressed down by the new growth above and occas- ionally large masses probably sunk bodily. In addition to this there was a contin- ual deposition of particles sinking from the under side of the mass. All this formed a soft black ooze or mud such as we find underlying our present peat bogs. At the same time rivers carrying down silt or fine clay from the Appalachian and Rocky mountains gradually covered the mass of vegetation and pushed the shore line further and further into the sea, all the time the vegetation of course creep- ing on ahead of the silt deposit. In this way the whole area was finally filled in so that now the Gulf of Mexico is all that is left of a sea that once covered the entire central part of the American con- tinent. Now we come to the chemical and physical changes which take place in veg- etable matter decaying in the absence of oxygen or under water. We have at the present time a continuous chain showing the formation of co
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
