During the summer and autumn of this year, a number of cases of yellow fever appeared at New-Bedford, Portland, and Norwich, in the New-England states; in New-York; in some parts of New-Jersey; and in Northampton and Bucks counties, in Pennsylvania. It prevailed so generally in New-York, as to produce a considerable desertion of the city. In none of the above places could the least proof be adduced of the disease being imported. In Philadelphia its existence was doubted or denied by most of the citizens, because it appeared in situations remote from the water, and of course could not be derived from any foreign source.
It will be difficult to tell why the fever appeared only in sporadic cases in Philadelphia. Perhaps its prevalence as an epidemic was prevented by the plentiful rains in the spring months, by the absence of moisture from the filth of the streets and gutters, in consequence of the dry weather in June and July, by the vigour and perfection of the products of the earth, and by the variable state of the winds in the month of July. If none of these causes defended the city from more numerous cases of the yellow fever, it must be resolved into the want of a concurring inflammatory constitution of the atmosphere with the common impure sources of that disease.
On the 12th of November, about twelve o'clock in the night, an earthquake was felt in Philadelphia, attended with a noise as if something heavy had fallen upon a floor. Several cases of scarlet fever appeared in December, but the prevailing disease, during the two last autumnal and the first winter months, was the measles. I have taken notice that it appeared in the south end of the city in July. During the months of August and September it was stationary, but in October, November, and December it spread through every part of the city. The following circumstances occurred in this epidemic, as far as it came under my notice.
AN ACCOUNT
OF
THE MEASLES,
AS THEY
APPEARED IN PHILADELPHIA,
IN THE YEAR 1801.
I. The disease wore the livery of the autumnal fever in the following particulars.
It was strongly marked by remissions and intermissions. The exacerbations came on chiefly at night.
There were in many cases a constant nausea, and discharge of bile by puking.