Experiments and Considerations Touching Colours | Page 7

by an Observation out of Olaus Magnus (100.) _and that the Snow does inlighten and clear the Air in the Night, confirm'd by the Mosco Physician, and Captain_ James (101.) _But that Snow has no inherent Light, prov'd by Experience_ (102.) _Thirdly, by the great store of Reflections, from white Bodies observ'd in a darkned Room, and by their unaptness to be Kindled by a Burning-glass_ (103.) _Fourthly, the Specularness of White Bodies is confirm'd by the Reflections in a dark Room from other Bodies_ (104.) _and by the appearance of a River, which both to the Eye and in a darkned Room appear'd White_ (105, 106.) _Fifthly, by the Whiteness of distill'd_ Mercury, and that of the Galaxie (107, 108.) _and by the Whiteness of Froth, rais'd from whites of Eggs beaten; that this Whiteness comes not from the Air, shew'd by Experiments_ (109, 110.) _where occasionally the Whiteness of Distill'd Oyls, Hot water, &c. are shew'd_ (111.) _That it seems not necessary the Reflecting Surfaces should be Sph?rical, confirm'd by Experiments_ (112, 113.) _Sixthly, by the Whiteness of the Powders of transparent Bodies_ (114.) _Seventhly, by the Experiment of Whitening and Burnishing Silver._ (115, 116.)
Chap. 2. _A Recital of some Opinions about Blackness, and which the Author inclines to_ (117.) which he further insists on and explicates (118, 119.) _and shews for what reasons he imbrac'd that Hypothesis_ (120.) _First, from the contrary Nature of Whiteness and Blackness, White reflecting most Beams outwards, Black should reflect most inward_ (120.) _Next, from the Black appearance of all Bodies, when Shadow'd; And the manner how this paucity of Reflection outwards is caus'd, is further explicated, by shewing that the Superficial parts may be Conical and Pyramical_ (121.) _This and other Considerations formerly deliver'd, Illustrated by Experiments with black and white Marble_ (122, 123.) _Thirdly, from the Black appearance of Holes in white Linnen, and from the appearance of Velvet stroak'd several ways, and from an Observation of Carrots_ (124, 125.) _Fourthly, from the small Reflection from Black in a darkned Room_ (125, 126.) _Fifthly, from the Experiment of a Checker'd Tile expos'd to the Sun-beams_ (127.) _which is to be preferr'd before a Similar Experiment try'd in_ Italy, with black and white Marble (128.) Some other congruous Observations (129.) _Sixthly, from the Roasting black'd Eggs in the Sun_ (130.) _Seventhly, by the Observation of the Blind man lately mention'd, and of another mention'd by_ Bartholine (130.) _That notwithstanding all these Reasons, the Author is not absolutely Positive, but remains yet a Seeker after the true Nature of Whiteness and Blackness._ (131, 132.)
Experiments _in Consort, touching_ Whiteness and Blackness.
The first Experiment, _with a Solution of Sublimate, made White with Spirit of Urine_, &c. (133, 134.)
The second Experiment, _with an Infusion of Galls, made Black with Vitriol_, &c. (135, 136.) _further Discours'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-c?dar, 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