The Contents.

Experiment the seventh , Of the appearances*f the same Co lour'd Papers by Candle-light ( 195,

196.)

Experiment the eighth , Of the Yellowness ofthe Flame of a Candle ( 197. )

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Experiment the ninth, Of the Greenish Blesttransparency of Leaf Gold (198.)

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Experiment the tenths Of the curious Tin'Hurts afforded by Lignum Nephriticum (frolv199 to 203.) Several trials for the Inveftlgd'tion of the Nature of it (.from 204 to 206.)Kircher’t relation of this tVoid set down , amexam! nd (from 206 to 212.) A Corollary otthis tenth Experiment, shewing how it may btapplicable far the Discovering , whether any Sqlt Itof an Acid, or a Sulphureous, and Ahaliz,attNature (from 213 to 21 6 .)

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The eleventh Experiment j Of certain pieces o\Glass that afforded this Vanety of Colours ; Amof the way of so Tinging any Plate os Glass witlSilver ( from 216102x9.)

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The twelfth Experiment, Of the Mixing aJTempering of Painters Pigments (219,2201121 .)

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The thirteenth Experiment, Of compoundingseveral Colours by 7 rd jetting the Sun-beattfthrough Ting d GUse’s ( from 12! to 224. )

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