ours'd of_ (137.)

_The third_ Experiment, _of the Blacking of Hartshorn, and Ivory, and
Tartar, and by a further Calcination making them White_ (138, 139.)

_The fourth_ Experiment, _limiting the_ Chymist's _principle_, Adusta nigra
sed perusta alba, _by several Instances of Calcin'd Alabaster, Lead,
Antimony, Vitriol, and by the Testimony of_ Bellonius, _about the white
Charcoles of_ Oxy-caedar, _and by that of_ Camphire. (140, 141, 142.) _That
which follows about Inks was misplac'd by an Errour of the Printer, for it
belongs to what has been formerly said of Galls_ (142, 143.)

_The fifth_ Experiment, _of the black Smoak of Camphire_ (144.)

_The sixth_ Experiment, _of a black_ Caput Mortuum, _of Oyl of Vitriol,
with Oyl of Worm-word, and also with Oyl of Winter-Savory_ (145.)

_The seventh_ Experiment, _of whitening Wax_ (146.)

_The eighth_ Experiment, _with Tin-glass, and Sublimate_ (147, 148.)

_The ninth_ Experiment, _of a Black powder of Gold in the bottom of_
Aqua-fortis, _and of the Blacking of Refin'd Gold and Silver_ (148, 149.)

_The tenth_ Experiment, _of the staining Hair, Skin, Ivory_, &c. _Black,
with Crystals of Silver_ (150, 151.)

_The eleventh_ Experiment, _about the Blackness of the Skin, and Hair of_
Negroes, _and Inhabitants of Hot Climates. Several Objections are made, and
the whole Matter more fully discours'd and stated from several notable
Histories and Observations_ (from the 151 to the 167.)

_The twelfth_ Experiment, _of the white Powders, afforded by Precipitating
several Bodies, as Crabs Eyes, Minium, Coral, Silver, Lead, Tin,
Quick-silver, Tin-glass, Antimony, Benzoin, and Resinous Gumms out of
Spirit of Wine_, &c. _but this is not Universal, since other Bodies, as
Gold, Antimony, Quick-silver_, &c. _may be Precipitated of other Colours_
(168, 169, 170.)

_The thirteenth_ Experiment, _of Changing the Blackness of some Bodies into
other Colours_ (171, 172.) _and of Whitening what would be Minium, and
Copper, with Tin, and of Copper with Arsnick, which with Coppilling again
Vanishes; of covering the Colour of that of_ 1/3 _of Gold with_ 2/3 _of
Silver melted in a Mass together_ (173, 174)

_The fourteenth_ Experiment, _of turning 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 th