A perpetual almanack [electronic resource] : Consisting of astronomical and chronological tables, shewing, by inspection, the golden number;-dominical letter;-moon's age;-time of high-water at Dublin-bar;-moveable and immoveable feasts;-sun's rising and setting; with the length of days and nights in any year, for ever. Likewise a table of the visible eclipses of the sun and moon, within the present century to the nearest hour. To which are added, tables for calculating lunar and solar eclipses, by which any person capable of adding and subtracting, may ascertain the day of such eclipses in any year past, or future, as well as the most eminent astronomer. By Robert Lowther.