. . . . "Dr. Frank C. Baxter traces the history of the measurement of time. Describes the construction of calendars, the principles of clocks and watches, the timing of natural phenomena in both microseconds and geological ages, and Einstein's theory of relativity."@en . "Dr. Frank C. Baxter traces the history of the measurement of time. Describes the construction of calendars, the principles of clocks and watches, the timing of natural phenomena in both microseconds and geological ages, and Einstein's theory of relativity." . . . . . . . . . . . . "About time"@en . "About time" . . . . . . . . . . . . . . . . . . . . . "N.W. Ayer & Son." . . . .