Astrological observations and predictions for the year of our Lord 1691 [electronic resource] : wherein also is briefely shewn the signification of the earthquake that hapned in March last in the city of Bristol : and wherein also are briefely shewn the significations of the three oppositions of Saturn and Jupiter, that will happen in the [sic] 1692 and 1693, and of the eclipses of this present year : likewise monthly observations for every month throughout this present year, briefely containing the most remarkable events and accidents that are likely to happen in divers places of the world / by John Silvester.