 Passing over the evidence respecting its presence in various galenas, in metallic lead, copper, silver, antimony, etc., we cite the following, perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies a deposit of clay,...  Report of Progress - Σελίδα 3των Geological Survey of Pennsylvania - 1875Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | American Philosophical Society - 1861 - 424 σελίδες
...convenient sum of ten sqnare miles. The average depth is believed to be not less than fifteen foet. The inquiry was started whether gold was diffused...a fair assay for the whole, the cellar of the new market-house in Market Street near Eleventh Street, we dug out sorue of the clay at a depth of fourteen... | |
 | 1861 - 362 σελίδες
...less than fifteen feet. The inquiry was started whether gold was diffused in this earthy bed. Prom a central locality, which might afford a fair assay...Market Street, near Eleventh Street, we dug out some of t!.e clay at a depth of fourteen feet, whpre it could not have been an artificial deposit. The weight... | |
 | 1862 - 448 σελίδες
...lead, copper, silver, antimony, etc., we cite the following, perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies...a fair assay for the whole, the cellar of the new market-house in Market Street, near Eleventh Street, we dug out some of the clay at a depth of fourteen... | |
 | 1862 - 446 σελίδες
...lead, copper, silver, antimony, etc., we cite the following, perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies...a fair assay for the whole, the cellar of the new market-house in Markct Street, near Eleventh Street, we dug out some of the clay at a depth of fourteen... | |
 | 1862 - 476 σελίδες
...lead, copper, silver, antimony, etc., we cite the following, perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies...a fair assay for the whole, the cellar of the new market-house in Market Street, near Eleventh Street, we dug out some of the clay at a depth of fourteen... | |
 | 1865 - 458 σελίδες
...lead, copper, silver, antimony, etc., we cite the following, perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies...a fair assay for the whole, the cellar of the new market-house in Market Street, near Eleventh Street, we dug out some of the clay at a depth of fourteen... | |
 | 1861 - 968 σελίδες
...copper, silver, antimony, &c., we cite the following • — perhaps the most curious result of all. Underneath the paved city of Philadelphia there lies...a fair assay for the whole, the cellar of the new market-house in Market Street near Eleventh Street, we dug out some of the clay at a depth of fourteen... | |
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