Report, Band 9

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Johns Hopkins Press, 1911
CONTENTS.--Vol. I (1897)--Vol. II (1898)--Vol. III (1899)--Vol. IV (1902)--Vol. V (1905)--Vol. VI (1906)--Vol. VII (1908)--Vol. VIII (1909)--Vol. IX (1911)--Vol. X (1918)--Vol. XI (1922)--Vol. XII (1928)--Vol. XIII (1937)--Vol. XIV (1941)

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Seite 258 - The large amount of this gas evolved from the beds of vegetable matter, undergoing change, would impart to the water of the adjoining strata the power of dissolving the diffused proto-carbonate, which, being then carried by infiltration through the more porous beds, would accumulate above and within the close argillaceous or shaly layers, forming, in some cases, bands of rock ore, in others, courses of nodular and plate ores. Of these, the former would seem to have resulted from the accumulation...
Seite 136 - An Act for the encouragement of an Iron manufacture within this Province. "WHEREAS, It is represented to this present General Assembly that there are very great conveniences of carrying on Iron Works within this Province which have not hitherto been embraced for want of proper encouragement to some first undertakers...
Seite 134 - Assembly of 1719 passed an act for the encouragement of iron manufacture, in which it is stated " that there are very great conveniences for carrying on of iron works within this province, which have not hitherto been embraced for want of proper encouragement to some first-class undertakers.
Seite 257 - ... sandstones, which are often crowded with the impressions and carbonized remains of plants, are at the same time more or less impregnated with this ferruginous compound. So, again, the soft argillaceous shales, in the midst of which the lenticular ore so frequently presents itself, show, by their dark color and included impressions of plants, as well as by actual analysis, that they are richly imbued with vegetable matter. Nor do the nearly white fire-clays, which in many cases enclose thick courses...
Seite 258 - In this process, which finds a simple explanation in the combined action of infiltration and the segregating force, it can hardly be questioned that the carbonic acid, pervading the mass of sediment, acted a very important part. The large amount of this gas evolved from the beds of vegetable matter, undergoing change, would impart to the water of the adjoining strata the power of dissolving the diffused proto-carbonate, which, being then carried by infiltration through the more porous beds, would...
Seite 258 - ... the close argillaceous or shaly layers, forming, in some cases, bands of rock ore, in others, courses of nodular and plate ores. Of these, the former would seem to have resulted from the accumulation by gravity of the dissolved carbonate in the substance of sandy shales, near the upper limit of the more impervious beds, while we may regard the latter as having been collected in all directions from the general charge of proto-carbonate accumulated in the argillaceous mass, its mobility in the...
Seite 151 - Daniel and Samuel Hughes were proprietors of an air furnace in Frederick County (afterward made Washington County). On July 1, 1776, the Maryland Convention authorized the Council of Safety to lend the proprietors for nine months the sum of £200 common money, to encourage them 'to prosecute their cannon foundry with spirit and diligence.
Seite 134 - ... all of these factors are favorable a comparatively low grade ore can readily be utilized at a profit, whereas many high grade ores less favorably situated are absolutely worthless. HISTORY OF THE MARYLAND IRON INDUSTRY. THE COLONIAL PERIOD. The credit of the discovery of iron ore in Maryland seems to belong to Captain John Smith. In his voyage up the Chesapeake Bay in 1608, he entered the Patapsco River which he named Bolus, because of the red clay found there, resembling "bole armoniack and...
Seite 258 - The gathering of the diffused Proto-Carbonate into bands and courses of ore began no doubt as soon as the production of this compound had made some progress, but it probably continued until long after the completion of the chemical changes above described ; and indeed, it is possible that in some strata it is not yet entirely finished. In this process, which finds a simple explanation in the combined action of infiltration and...
Seite 138 - that no forge, going by water, or other works should be erected in any of the said plantations, for the making, working, or converting of any sows, pigs, or cast-iron into bar or rod iron.

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