py in
the acquaintance of many intelligent friends) is highly valued; And to my
knowledge, there are those among the French, that have lately begun to
learn English, on purpose to enable themselves to read his Books, being
impatient of their Traduction into Latin. If I durst say all, I know of the
Elogies received by me from abroad concerning Him, I should perhaps make
this Preamble too prolix, and certainly offend the modesty of our Author.

Wherefore I shall leave this, and conclude with desiring the Reader, that
if he meet with other faults besides those, that the Errata take notice of
(as I believe he may) he will please to consider both the weakness of the
Authors eyes, for not reviewing, and the manifold Avocations of the
Publisher for not doing his part; who taketh his leave with inviting those,
that have also considered this Nice subject experimentally, to follow the
Example of our Noble Author, and impart such and the like performances to
the now very inquisitive world. _Farewell._

_H. O._

* * * * *

THE
CONTENTS.

* * * * *

CHAP. I.

_The Author shews the Reason, first of his Writing on this Subject_ (1.)
_Next of his present manner of Handling it, and why he partly declines a
Methodical way_ (2.) _and why he has partly made use of it in the History
of_ Whiteness _and_ Blackness. (3.)

Chap. 2. _Some general Considerations are premis'd, first of the
Insignificancy of the Observasion of Colours in many Bodies_ (4, 5.) _and
the Importance of it in others_ (5.) _as particularly in the Tempering of
Steel_ (6, 7, 8.) _The reason why other particular Instances are in that
place omitted_ (9) _A necessary distinction about Colour premis'd_ (10,
11.) _That Colour is not Inherent in the Object_ (11.) _prov'd first by the
Phantasms of Colours to_ Dreaming _men, and_ Lunaticks; _Secondly by the
sensation or apparition of Light upon a Blow given the Eye or the Distemper
of the Brain from internal Vapours_ (12.) _The Author recites a particular
Instance in himself; another that hapn'd to an Excellent Person related to
him_ (13.) _and a third told him by an Ingenious Physician_ (14, 15.)
_Thirdly, from the change of Colours made by the Sensory Disaffected_ (15,
16.) _Some Instances of this are related by the Author, observ'd in
himself_ (16, 17.) _others told him by a Lady of known Veracity_ (18.) _And
others