_the fourth, That Alum is usefull for the preparing other than
Vegetable Pigments_ (379.)

_The fiftieth_ Experiment, _Of the Similar effects of_ Saccarum Saturni
_and_ Alkalies, _of Precipitating with Oyl of_ Vitriol _out of_
Aqua-fortis, _and Spirit of_ Vinegar; _and of divers Varyings of the
Colours, with these Compounded_ (from 380 to 384.) _Another very pretty_
Experiment, _with a Solution of_ Minium (384, 385.) _That these_
Experiments _Skilfully digested may hint divers matters about Colours_
(386.) _The Authors Apologetick conclusion, in which is Cursorily hinted
the Bow or Scarlet Dye_ (387.) _The Authors Letter to Sir_ Robert Moray,
_concerning his Observations on the Shining Diamond_ (391. &c.) _And the
Observations themselves_.

* * * * *

Errata.

Pag. 142. l. 20. These words, _And to manifest_, with the rest of what is
by a mistake further printed in this fourth Experiment, belongeth, and is
to be referred to the end of the second Eperiment, p.137. pag. 145. l. 1.
leg. _matter_. 146. l. 4. leg. _Bolts-head_. pag 161. in the marginal note
l. 2. dele _de_ ib. l. 3. lege lib 1. p 163. l. ult. insert _where_ between
the words _places_ and _the_. p. 164 l. 1. dele _that_. ibid, l. 8. leg
_Epidermis_. ibid. l. 19 leg. 300. for 200. p. 169. l. 22. leg. _into it_.
p. 170. l. 23. & 24. leg. _Some Solutions hereafter to be mentioned_, for
_the Solutions of Potashes_, and other _Lixiviate Salts_. p. 171. l. 6.
insert _part of_ between the words _most_ and _dissolved_ p. 176. l. ult.
insert the participle _it_ between the words _Judged_ and _not_ p. 234. l.
4. leg. _Woud-wax_ or _Wood-wax_. p. 320 l. 29. leg. _urine_ for _urne_.

* * * * *

_THE_
_EXPERIMENTAL HISTORY_
_OF COLOURS BEGUN._

THE FIRST PART.

CHAP. I.

1 I have seen you so passionately addicted, _Pyrophilus_ to the delightful
Art of Limning and Painting, that I cannot but think my self obliged to
acquaint you with some of those things that have occurred to mee concerning
the changes of Colours. And I may expect that I shall as well serve the
_Virtuosi_ in general, as gratifie you in particular, by furnishing a
person, who, I hope, will both improve my Communications, and communicate
his Improvements, with such Experiments and Observations as may both invite
you to enquire seriously into the Nature of Colours, and ass