The Encyclopædia Britannica, Or, Dictionary of Arts, Sciences, and General Literature, 16. köideAdam & Charles Black, 1858 |
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Page 3
... measure erroneous . He invented a method of dividing a quadrant by means of concentric circles , which , after having been much improved by Dr Halley , is used at present , and is called a nonius . In the year 1577 , William Bourne ...
... measure erroneous . He invented a method of dividing a quadrant by means of concentric circles , which , after having been much improved by Dr Halley , is used at present , and is called a nonius . In the year 1577 , William Bourne ...
Page 4
... measure useless . In treating of the sun's declination , he took notice of the gradual decrease in the obliquity of the ecliptic ; he also described the cross staff with three transverse pieces , which he admitted were then in common ...
... measure useless . In treating of the sun's declination , he took notice of the gradual decrease in the obliquity of the ecliptic ; he also described the cross staff with three transverse pieces , which he admitted were then in common ...
Page 5
... measure sufficient for his purpose . The dimensions of the earth deduced by him corresponded very well with the ... measuring the dimensions of the earth , with the true length of the degrees of a great circle upon it ; and in 1635 he ...
... measure sufficient for his purpose . The dimensions of the earth deduced by him corresponded very well with the ... measuring the dimensions of the earth , with the true length of the degrees of a great circle upon it ; and in 1635 he ...
Page 6
... measure of forty - two feet to a knot . In this treatise Norwood also describes his own excellent method of set- ting down and perfecting a sea reckoning , by using a tra- verse table , which method he had followed and taught for many ...
... measure of forty - two feet to a knot . In this treatise Norwood also describes his own excellent method of set- ting down and perfecting a sea reckoning , by using a tra- verse table , which method he had followed and taught for many ...
Page 8
... measure the angle between the planes of the two meridians . Hence arc LM : arc EF :: OL : CE :: OL : CL , because CE = CL ; OL or arc LM = arc EF x CL = arc EF x cos LCE = arc EF × cos l . arc EF x sin OCL Hence if FE be the length of ...
... measure the angle between the planes of the two meridians . Hence arc LM : arc EF :: OL : CE :: OL : CL , because CE = CL ; OL or arc LM = arc EF x CL = arc EF x cos LCE = arc EF × cos l . arc EF x sin OCL Hence if FE be the length of ...
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