_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.) _The twenty eighth_ Experiment, _of other differing Effects on Mary-golds, Prim-roses, and fresh Madder_ (265.) _with an Admonition, that these Salts may have differing Effects in the changing of the tinctures of divers other Vegetables_ (266, 267.) _The twenty ninth_ Experiment, _of the differing Effects of these Salts on Ripe and Unripe Juices, instanced in Black-berries, and the Juices of Roses_ (from 267 to 270.) _Two reasons, why the Author added this twenty ninth_ Experiment, _the last of which is confirm'd by an Instance of Mr._ Parkinson, _consonant to the Confession of the Makers of such Colours_ (272.) _The thirtieth_ Experiment, _of several changes in Colours by Digestion, exemplify'd by an_ Amalgam _of_ Gold _and_ Mercury _and by Spirit of Harts-horn. And (to such as believe it) by the changes of the_ Elixir. _The thirty first_ Experiment, _shewing that most Tinctures drawn by Digestion Incline to a Red, instanc'd in_ Jalap, Guaicum, _Amber, Benzoin, Sulphur, Antimony_, &c. (276, 277.) _The thirty second_ Experiment, _That some Reds with Diluting turn Yellow, others not, exemplify'd by the Tincture of_ Cochineel, _and by Balsam of_ Sulphur, _Tinctures of_ Amber, &c. (277, 278, 279.) _The thirty third_ Experiment, _of a Red Tincture of_ Saccarum Saturni _and Oyl of_ Turpentine _made by Digestion_ (279.) _The thirty fourth_ Experiment, _of drawing a Volatile red Tincture of Mercury_, _whose Steams were white, but it would Tinge the Skin black_ (279, 280.) _The thirty fifth_ Experiment, _of a suddain way of making a Blood red Colour with Oyl of_ Vitriol, _and Oyl of_ Anniseeds, _two transparent Liquors_ (280, 281.) _The thirty sixth_ Experiment, _of the Degenerating of several Colours exemplify'd in the last mention'd Blood red, and by Mr._ Parkinsons _relation of_ Turnsol, _by some Trials with the Juice of Buck-thorn Berries, and other Vegetables, to which several notable Considerations and Advertisements back'd with_ Experiments _are adjoyn'd_ (from 281 to 288.) _The thirty seventh_ Experiment, _Of Varying the Colour of the Tinctures of_ Cochineel, _Red-cherries, and Brasil, with Acid and Sulphureous Salts, and divers Considerations thereon_ (from 288 to 290.) _The thirty eighth_ Experiment, _About the Red fumes of some, and White of other distill'd Bodies, and of their Coalition for the most part into a transparent Liquor_ (290, 291.) _And of the various Colours of dry Sublimations, exemplify'd with several_ Experiments (292, 293, 294.)