_The one and twentieth_ Experiment, _of the same Changes effected by the
same means on the Blew Tinctures of Corn-flowers_ (249, 250.) _And some
Restrictions to shew it not to be so general a propriety as one might
imagine_ (251.)

_The twenty second_ Experiment, _of turning a Solution of Verdigrease into
a Blew, with Alcalizate and Urinous Salts_ (252, 253, 254.)

_The twenty third_ Experiment, _of taking away the Colour of Roses with the
Steams of Sulphur, and heightning them with the Steams Condens'd into Oyl
of Sulphur_ per Campanam (254, 255.)

_The twenty fourth_ Experiment, _of Tinging a great quantity of Liquor with
a very little Ting'd Substance, Instanced in_ Cochineel (from 255 to 257.)

_The twenty fifth_ Experiment, _of the more general use of Alcalizate and
Sulphureous Salts in the Tinctures of Vegetables, further Instanced in the
Tincture of Privet Berries, and of the Flowers of Mesereon and Pease_ (from
257 to 259.) _An_ Annotation, _shewing that of the three Hypostatical
principles, Salt according to_ Paracelsus _is the most active about
Colours_ (from 259 to 261.) _Some things Precursory premis'd to three
several Instances next following, against the fore-mention'd Operations of
Salts_ (261, 262.)

_The twenty sixth_ Experiment, _containing Trials with Acid and Sulphureous
Salts on the Red Tinctures of Clove-july-flowers, Buckthorn Berries,
Red-Roses, Brasil_, &c. (262, 263.)

_The twenty seventh_ Experiment, _of the changes of the Colour of Jasmin
flowers, and Snow drops, by Alcalizate and Sulphureous Salts_ (263, 264.)