History of the Hour presents the first sustained and reliable treatment of how mechanical clocks functioned in cities and dispels many myths associated with the clock's history. For example, Dohrn-van
"Days, months, and years were given to us by nature, but we invented the week for ourselves. There is nothing inevitable about a seven-day cycle, or about any other kind of week; it represents an arb
Delightful verses and delicate, playful illustrations take young children through the special joys of each month of the year, from icy February to the green shoots of April, the red poppies of July, S
This fascinating approach to sundials offers a rigorous appraisal of the science of sundials, including mathematical treatment and pertinent astronomical background. It also?provides a nontechnical tr
