Newton occupied in grinding hyperbolical Lenses — H is first Experiments with the Prism made in 1666 — He discovers the Composition of White Light, and the different Refrangi bility of the Rays which compose it — Abandons his attempts to improve Refracting Telescopes, and resolves to attempt the Construction of Reflecting ones — He guits Cambridge on Account of the Plague Constructs two Reflecting Telescopes in 1668, the first ever executed — One of them examined by the Royal Society, and shown to the King — He constructs a Telescope with Glass Specular — Recent History of the Reflecting Telescope Airy's Glass Specula Hadley's Reflecting 7 elescopes Short's Herschel's Supposed Decline of Science in England.
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