FOR although there is a great Difference in Salts of different Kinds, yet there is a common Property amongst them all, that when joined together they cannot hardly by any Means possibly be afterwards separated, for which Reason when these two Enemies of Mankind were joined, the complicated Evil was at first customarily distinguished by the _outlandish Scurvy_, which by a confederate Power had increased its Malignity to so great a Degree. But to give some apparent Facts, which irrefragably prove the natural Union between these two Origins of Mischief, it may be proper to recite some Symptoms common to them both, and first of all those Spots which were their certain Characteristicks. THE Spots of those in the Plague were sometimes so numerous, as to cover all the Body, of which we shall say more hereafter; and if we consider the Appearances and Conditions of the Spots in both, we shall find a very great Agreement; the pestilential Spots sometimes break out broad, at other Times more contracted, just in the same Manner as it happens in a Scurvy; and as to their Duration, sometimes they are longer out than at others in both; now also suddenly appear, and then again as suddenly turn in, and sometimes remain out for two or three Days together; and their Likeness in all Respects is frequently so great, that amongst the ignorant Nurses and Empiricks, sometimes the fatal Tokens of a Pestilence have been mistaken only for Scurvy Spots: As to their Colour in a Plague, as well as in a Scurvy, they are sometimes florid, resembling fresh Flea-Bites, and at others dusky and livid; and I met with them in a certain Youth resembling Violet Flowers painted all over the Body; and in some I have seen them almost quite black, which are with great Difficulty to be distinguished from the true pestilential Tokens. THERE are other Symptoms also that denote the Agreement herein, such as large Stools, of a saline and fetid Nature, and which are with great Difficulty restrained by the most powerful Medicines; but if such a Flux continues, it threatens irretrievable Injuries, as Corrosion, Inflammation, and sometimes even Sphacelation of the Bowels, with intolerable Gripings, and sometimes Loss of Blood: Furthermore, the Agreement that there is between the Ulcers and Tumours of both evidently demonstrate the Affinity of both their Origins, as will hereafter more fully appear in that Part about the Cure. THE Pestilence likewise shews its Affinity with the Scurvy, by leaving behind it a scorbutick Habit, even where a Person was not given to it in the least before; and it is not indeed at all strange, that after such Disorders, and Corruption of the animal Juices, and such an Exhalation or Suffocation of subtile and spirituous Particles, an Habit should be confirmed, that can be removed but by the most generous Remedies, and the most powerful Antiscorbuticks.