Observ. [2]. Of the Edge of a Razor.
A description of it: the causes of its roughness: of the roughness of very well polisht Optick Glasses..
Obser. [3]. Of fine Lawn.
A description of it: A silken Flax mention’d, an attempt to explicate the Phænomena of it, with a conjecture at the cause of the gloss of Silk.
Observ. [4]. Of Tabby.
A short description of it. A conjecture about the reason why Silk is so susceptible of vivid colours: and why Flax and Hair is not. A conjecture, that it may perhaps be possible to spin a kind of artificial Silk, out of some glutinous substance that may equalize natural Silk.
Observ. [5]. Of water’d Silks.
The great unaccurateness of artificial works. A description of a piece of water’d Silk; an Explication of the cause of the Phænomena: the way by which that operation is perform’d: some other Phænomena mention’d depending on the same cause.
Observ. [6]. Of Glass Canes.
The exceeding smallness of some of these Bodies. By what means the hollowness of these small pipes was discover’d: several Phænomena of it mention’d. An attempt to explicate them from the congruity and incongruity of Bodies: what those proprieties are. A hypothetical explication of fluidity: of the fluidity of the air, and several other Phænomena of it: of congruity & incongruity; illustrated with several Experiments: what effects may be ascrib’d to these properties: an explication of the roundness of the surface of fluid Bodies: how the ingress of fluid bodies into a small hole of an heterogeneous body is hindred by incongruity; a multitude of Phænomena explicable hereby. Several Quæries propounded; 1. Concerning the propagation of light through differing mediums. 2. Concerning Gravity. 3. Concerning the roundness of the Sun, Moon, and Planets. 4. Concerning the roundness of Fruits, Stones, and divers artificial Bodies. His Highness Prince Rupert’s way of making Shot. Of the roundness of Hail. Of the grain of Kettering Stone, and of the Sparks of fire. 5. Concerning springiness and tenacity. 6. Concerning the original of Fountains; several Histories and Experiments relating thereto. 7. Concerning the dissolution of Bodies in Liquors. 8. Concerning the universality of this Principle: what method was taken in making and applying experiments. The explication of filtration, and several other Phænomena; such as the motion of Bodies on the surface of Liquors; several Experiments mention’d to this purpose. Of the height to which the water may rise in these Pipes; and a conjecture about the juices of Vegetables, & the use of their pores. A further explication of Congruity: And an attempt of solving the Phænomena of the strange Experiment of the suspension of the Mercury at a much greater height then thirty inches. The efficacy of immediate contact, and the reason of it.