DISEASES CLASS II. 1. 3. 14. 



contagious fever, with great arterial debility; as in some of them, 

 in the latter stage of the disease, an emphysema could often be 

 felt in some parts, which evinced a considerable progress of gan- 

 grene beneath the skin. In the sensitive inirritated fevers of 

 these animals, I suppose about sixty grains of opium, wiCh two 

 ounces of extract of oak-bark, every six hours, would supply 

 them with an efficacious medicine; to which might be added 

 thirty grains of vitriol of iron, if any tendency to bloody urine 

 should appear, to which this animal is liable. The method of 

 preventing the infection from spreading, if it should ever again 

 gain access to this island, would be immediately to obtain an or- 

 der from government to prevent any cattle from being removed, 

 which were found within five miles of the place supposed to be 

 infected, for a few days; till the certainty of the existence of 

 the pestilence could be ascertained, by a committee of medical 

 people. As soon as this was ascertained, all the cattle within 

 five miles- of the place should be immediately slaughtered, and 

 consumed within the circumscribed district; and their hides put 

 into lime-water, before proper inspectors. 



14. Pemphigus is a contagious disease, attended with blad- 

 dery eruptions, appearing on the second or third day, as large as 

 filberts, which remain many days, and then effuse a thin ichor. 

 It seems to be either of a mild kind, with sensitive fever only, of 

 which I have seen two instances; or with irritated, or with in- 

 irritated fever; as appears from the observations of M. Salabert. 

 See Medical Comment. By Dr. Duncan, Decad. II. Vol. VI. 



15. Varicella. Chicken-pox is accompanied with sensitive 

 fever, pustules break out after a mild fever, like the small-pox, 

 seldom suppurate, and generally terminate in scales without scars. 

 I once saw a lady who miscarried during this disease, though all 

 her children had it as slightly as usual. It sometimes leaves 

 scars ur marks on the skin. This disease has been mistaken for. 

 the small-pox, and inoculated for it ; and then the small-pox has 

 been supposed to happen twice to the same person. See Trans, 

 of the College, London. It is probable that the pemphigus and 

 urticaria, as well as this disease, have formerly been diseases of 

 more danger; which the habit of innumerable generations may 

 have rendered mild, and will in process of time annihilate. In 

 the same manner as the small-pox, venereal disease, and rickets, 

 seem to become milder or less in quantity every half century. 

 While at the same time, it is not improbable, that other new dis- 

 eases may arise; and, for a season, thin mankind. 



16. Urticaria. Nettle rash begins with mild sensitive fever, 

 which is sometimes scarcely perceptible. Hence this eruption 

 has been thought of two sorts, one with and the other without 



