Medical and physical memoirs, containing, among other subjects, a particular enquiry into the origin and nature of the late pestilential epidemics of the United States / [Charles Caldwell].

  • Charles Caldwell
Date:
1801
Catalogue details

Licence: Public Domain Mark

Credit: Medical and physical memoirs, containing, among other subjects, a particular enquiry into the origin and nature of the late pestilential epidemics of the United States / [Charles Caldwell]. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    nection with the nature and productions of‘. the surrounding country, it would appear to. be considerable. The whole plain is subtend- ed by a stratum of granite rock, which lies attj the distance of about forty five or hity fcett] beneath the surface of the earth. The site of the city, though not very low, is evidently, like the whole country east of tj our great granite ride, of secondary origin. It tj is washed to the eastward by the Delaware,, and to the west by the Shuylkill, and lies, about five miles above the confluence of: these two rivers. Its elevation above low- water mark, ranges from forty five to fifty five:! feet, the highest spot being the point of thej intersection of Cliesnut and Broad streets. To this elevation, Water and Penn streets, running along the shore of the Delaware, constitute an exception. Leaving the general level by an abrupt descent, they are many feet lower than any other part of the city. It deserves to be remarked that in these depressed situations, where the air is particu* larly liable to become motionless and conta- minated, our autumnal pestilence has always commenced its epidemic ravages. This dis- ease has appeared twice within a few paces
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