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                             [Decoration]

                                   AN
                                 ESSAY
                                   ON
                         _Contagious Diseases_.

                             [Decoration]




                                   AN
                                 ESSAY
                                   ON
                         _Contagious Diseases_:


                           More particularly

    On the _Small-Pox_, _Measles_, Putrid, Malignant, and
    Pestilential Fevers.


                       By _Clifton Wintringham_.


                                 YORK:

    Printed by _Charles Bourne_ for _Francis Hildyard_, and are to
    be Sold by _W. Taylor_, at the Sign of the _Ship_ in
    _Pater-noster-Row_ LONDON, 1721.




                              [Decoration]


                                  THE
                                PREFACE.


_The Design of this small Treatise being to deduce the Causes, and
explain the_ Phoenomena _of some of the most Fatal Diseases which
afflict Mankind, can stand in Need of no Excuse, whatever the_
_Performance it self may; and especially at a Time, when not only
several of them Rage amongst us with uncommon Violence, but we are Daily
threatned with the dreadful Calamity of a Raging Pestilence. I have
endeavour'd to reduce these Diseases to the same Simplicity with Others,
to speak Intelligibly of them, and show the real Changes in the Animal
Oeconomy, from the Principles of the Modern Philosophy._

_The Learned Authors who have already wrote on this Subject, have
rejected this Part of it, as being so easie and obvious as to need no
Explanation. I doubt not indeed but this is their Case: