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Contents
xix
PAGE
§ 148. | The Rudolphine Tables |
194 |
§ 149. | Work under Wallenstein : death |
195 |
§ 150. | Minor discoveries : speculations on gravity |
195 |
§ 151. | Estimate of Kepler's work and intellectual character |
197 |
CHAPTER VIII.
198-209 |
§ 152. | The general character of astronomical progress during the period |
198 |
§ 153. | Scheiner's observations of faculae on the sun. Hevel : his Selenographia and his writings on comets : his star catalogue. Riccioli's New Almagest |
198 |
§ 154. | Planetary observations : Huygens's discovery of a satellite of Saturn and of its ring |
199 |
§ 155. | Gascoigne's and Aouzout's invention of the micrometer : Picard's telescopic "sights" |
202 |
§ 156. | Horrocks : extension of Kepler's theory to the moon : observation of a transit of Venus |
202 |
§§ 157-8. | Huygens's rediscovery of the pendulum clock : his theory of circular motion |
203 |
§ 159. | Measurements of the earth by Snell, Norwood, and Picard |
204 |
§ 160. | The Paris Observatory : Domenico Cassini : his discoveries of four new satellites of Saturn : his other work |
204 |
§ 161. | Richer's expedition to Cayenne : pendulum observations : observations of Mars in opposition : horizontal parallax : annual or stellar parallax |
205 |
§ 162. | Roemer and the velocity of light |
208 |
§ 163. | Descartes |
208 |
CHAPTER IX.
210-246 |
§ 164. | Division of Newton's life into three periods |
210 |
§ 165. | Early life, 1643 to 1665 |
210 |
§ 166. | Great productive period, 1665-87 |
211 |