The Port Folio, Volume 2Editor and Asbury Dickens, 1809 - Philadelphia (Pa.) |
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Page 232
... limestone project and overhang , until they break off by their own weight . Owing to this abrasion or decay of the brittle shistus , the calcareous rocks above jut far beyond their present base , and threaten him who takes shelter below ...
... limestone project and overhang , until they break off by their own weight . Owing to this abrasion or decay of the brittle shistus , the calcareous rocks above jut far beyond their present base , and threaten him who takes shelter below ...
Page 233
... limestone . They are piled up to a great height . They are dis- posed horizontally , and are of the flat or tabular form . Their strength and compactness enables them to overhang the banks , after their foun- dation of brittle slate has ...
... limestone . They are piled up to a great height . They are dis- posed horizontally , and are of the flat or tabular form . Their strength and compactness enables them to overhang the banks , after their foun- dation of brittle slate has ...
Page 234
... limestone by virtue of a more powerful attraction . Thus the common limestone is converted into plaster of paris ; or in chymical lan- guage , the carbonate of lime is changed into a sulphate . The two compounds very commonly exist ...
... limestone by virtue of a more powerful attraction . Thus the common limestone is converted into plaster of paris ; or in chymical lan- guage , the carbonate of lime is changed into a sulphate . The two compounds very commonly exist ...
Page 235
... limestone ; and their quantity is relatively small , particularly at the former place . At the latter , the colour of the flint concurs with that of the calcareous strata in which it is immerged , to have obtained for the spot the name ...
... limestone ; and their quantity is relatively small , particularly at the former place . At the latter , the colour of the flint concurs with that of the calcareous strata in which it is immerged , to have obtained for the spot the name ...
Page 236
... limestone will , after sufficient agitation and exposure , lose its coherence and be transformed to sand , or vanish in solution . In either case , whether the rocks are pulverized or dissolved , 236 REMARKS ON THE FALLS OF NIAGARA .
... limestone will , after sufficient agitation and exposure , lose its coherence and be transformed to sand , or vanish in solution . In either case , whether the rocks are pulverized or dissolved , 236 REMARKS ON THE FALLS OF NIAGARA .
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