Worvill, Roy, <br/><br/>
Time, calendars and clocks / 
Roy Worvill ; with illustrations by B.H. Robinson. 
 - 50 pages :  color illustrations ;  18 cm. 
 - A Ladybird achievements book .
 - Ladybird achievements books. .
<br/><br/>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. 
<br/><br/><label>ISBN: </label>0721403360 9780721403366 
<br/><br/><label>Nat. Bib. No.: </label>GB7303686  bnb 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>010332542  Uk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clocks and watches--Juvenile literature.<br/>Time--Juvenile literature.<br/>Clocks and watches.<br/>Time.
<br/><br/><label>Subjects--Index Terms: </label>Clocks and watches Juvenile literature United Kingdom Robinson B.H. [Illustrator] Education 
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Juvenile works.