THE STORY OF TIME AND CLOCKS

This entry in the Signs of the Times series is not equal to Ganeri's The Story of Writing and Printing (1996). Here, visual clutter and intellectual imprecision mar the presentation of a subject that demands clarity. There are as many as four illustrations (mostly full-color photographs), one or two fact boxes, a red border of unidentified icons, and up to eight different typefaces per page. Two-page spreads cover subjects such as the need for timekeeping and ancient ways of marking seasons; information comes in short, self-contained paragraphs, with little continuity and with some odd juxtapositions, e.g., a paragraph on the Doomsday Clock (which does not measure time at all but perceived threat of nuclear catastrophe) follows one on atomic clocks, which may lead readers to falsely associate the two. The discussion of time zones is ambiguous: Westbound travelers do lose an hour in crossing each time zone, but in setting back watches or clocks, gain hours in the day. The definitions of a.d. and b.c. are buried in the glossary; the index, misspelling the name of the 17th-century astronomer Johannes Hevelius, is occasionally illogical, listing early Greek and Egyptian topics under A for ``ancient,'' and listing equally antique Babylonian and Roman practices under B and R, respectively. Better books include Brenda Walpole's Time (1995), of equivalent length and reading level, and Franklyn Branley's less colorful but more authoritative Keeping Time (1993). (chronology, glossary, index) (Nonfiction. 8-11)