Experiments and Considerations Touching Colours | Page 8

the black Body of Horn into a White immediately with Scraping, without changing the Substantial form, or without the Intervention of Salt, Sulphur, or Mercury_ (176.)
The fifteenth Experiment, contains several Instances against the Opinion of the Chymists that Sulphur Adust _is the cause of Blackness, and the whole Matter is fully discuss'd and stated_ (from 176 to 184)
Part the Third.
Concerning Promiscuous Experiments about Colours.
Experiment the First.
IN confirmation of a former Conjecture about the Generation of Colours from diversity of Reflections are set down several Observations made in a Darkned room (186, 187.)
Experiment _the second, That white Linnen seem'd Ting'd with the Red of Silk plac'd near it in a light Room_ (188,189.)
Experiment _the third, Of the Trajection of Light through Colour'd Papers_ (189, 190.)
Experiment _the fourth, Observations of a Prism in a dark Room_ (191, 192.)
Experiment _the fifth, Of the Refracting and Reflecting Prismatical Colours in a light Room_ (193.)
Experiment _the sixth, On the Vanishing of the_ Iris _of the Prism, upon the access of a greater adventitious Light_ (194.)
Experiment _the seventh, Of the appearances of the same Colour'd Papers by Candle-light_ (195, 196).
Experiment _the eighth, Of the Yellowness of the Flame of a Candle_ (197).
Experiment _the ninth, Of the Greenish Blew transparency of Leaf Gold_ (198).
Experiment _the tenth, Of the curious Tinctures afforded by_ Lignum Nephriticum (from 199 to 203). Several trials for the Investigation of the Nature of it (from 204 to 206.) Kircher's _relation of this Wood set down, and examin'd_ (from 206 to 212). A Corollary on this tenth Experiment, _shewing how it may be applicable for the Discovering, whether any Salt be of an Acid, or a Sulphureous, and Alcalizate Nature_ (from 213 to 216).
The eleventh Experiment, _Of certain pieces of Glass that afforded this Variety of Colours; And of the way of so Tinging any Plate of Glass with Silver_ (from 216 to 219).
The twelfth Experiment, Of the Mixing and Tempering of Painters Pigments (219, 220, 221).
The thirteenth Experiment, _Of compounding several Colours by Trajecting the Sun-beams through Ting'd Glasses_ (from 221 to 224).
The fourteenth Experiment, _Of the Compounding of Real and Phantastical Colours, and the Results_ (224, 225, 226.) as also the same of Phantastical Colours (226, 227.)
The fifteenth Experiment, Of Varying the Trajected Iris _by a Colour'd Prism_ (228, 229.)
The sixteenth Experiment, Of the Red fumes of Spirit of Nitre, _and, the resembling Redness of the Horizontal Sun-beams_ (230, 231.)
The seventeenth Experiment, Of making a Green by nine Kinds of Compositions (from 231 to 236.) And some Deductions from them against the necessity of recurring to Substantial forms and Hypostatical principles for the production of Colours (from 237 to 240.)
The eighteenth Experiment, _Of several Compositions of Blew and Yellow which produce not a Green, and of the production of a Green by other Colours_ (241, 242.)
The nineteenth Experiment, _contains several instances of producing Colours, without the alteration of any Hypostatical principle, by the Prism, Bubbles, and Feathers_ ( from 242 to 245.)
The twentieth Experiment _Of turning the Blew of Violets into a Red by Acid Salts, and to a Green by Alcalizate (245, 246.) and the use of it for Investigating the Nature of Salts_ (247, 248.)
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.)
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,