Review. 93 



work will be best formed from a perusal of their own 

 introduction, which we therefore give entire. 



" On the re-appearance of the pestilential fever in 

 this city, in 1793, after an interval of more than thirty 

 years, we were struck with its mortality and conta- 

 gious nature, as well as with the train of symptoms, 

 so widely different from any thing we had been accus- 

 tomed to. These considerations naturally produced 

 a supposition of its foreign origin ; and, in the course 

 of our inquiries on the subject, we were led to make 

 the following conclusion, in reply to the requisition 

 of the governor of the commonwealth, on the origin 

 of the disease. 



" No instance has ever occurred, of the disease 

 <{ called the Yellow Fever being generated in this 

 " city, or in any other part of this state, as far as we 

 " know ; but there have been frequent instances of 

 *i its having been imported, not only into this, but 

 " into other parts of North- America, and prevailing 

 " there for a certain period of time ; and from the 

 " rise, progress, and nature of the malignant fever, 

 " which began to prevail here about the beginning 

 " of last August, and extended itself gradually over 

 " a great part of the city, we are of opinion, that this 

 " disease was imported into Philadelphia, by some of 

 " the vessels which arrived in the port after the mid- 

 " die of July. This opinion we arc further confirmed 

 " in, by the various accounts we have received from 

 " the best authorities Ave could procure on the sub- 

 "ject." 



