TY  - BOOK
AU  - Worvill,Roy
TI  - Time, calendars and clocks
T2  - A Ladybird achievements book
SN  - 0721403360
PY  - 1973///
CY  - Loughborough [England]
PB  - Ladybird Books
KW  - Clocks and watches
KW  - Juvenile literature
KW  - Time
KW  - fast
KW  - Clocks and watches Juvenile literature
KW  - United Kingdom
KW  - Robinson B.H. [Illustrator]
KW  - Education
KW  - Juvenile works
N1  - What is time? -- What is the time? -- Sundials and shadow clocks -- Stars and star-clocks -- The water clock -- The sand clock -- Fire clocks: candles and lamps -- The first mechanical clocks -- Weights, springs and pendulums -- A great clock-maker -- Navigation at sea -- John Harrison and the marine chronometer -- The first watches -- The long-case clock and the wall clock -- More than time -- Quartz crystal and atomic clocks -- Clock time and sundial time -- Time-zones and the International Date Line -- Earth, sun and seasons -- The sun calendar and Ancient Egypt -- The moon calendar -- The calendar of Julius Caesar -- The calendar of Pope Gregory -- Our world and the Great Year
ER  -