Problems in time and space; a collection of essays relating to the earth, physically and astronomically, and cognate matters,

How the distance and size of the sun were measured.--A simple means of ascertaining the day of the week of any given date in the Christian era.--Measuring the earth.--Solar and sidereal time.--The reform of the calendar.--The magnetism of the earth.--The movements of the sun and of the earth in space.--Logarithms and their inventor.--Gravitation the chief cause of the general oceanic circulation.--Twilight and dawn.--Appendix.Mode of access: Internet