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ASTRONOMICAL 



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A P E R S. 



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109 



place of fo much confequence in the Britifli navigation, 

 rcfolvcd that proper aftronomical obfcrvations fhould be 

 made at the Lizard for that purpofe; and the tranfit of 

 Venus appeared a convenient opportunity, itfelf affording 

 one of the beft means of determining the lonc^itude of 

 places; and the ecHpfe of the Sun which was to happen 

 the morning after, affording another of determining the 

 fame. 



Mr, John 



nephew of the late 



Dr. Bradley, and formerly his afhftant at the royal obfer- 

 yatory, was appointed to make thefe obfcrvations. The 

 inllruments which he was provided with, were an equal- 

 altitude and tranfit inflrument in one, an aflronomicaf 

 quadrant, and a refleding telefcope of two feet focus, all 



""■-Bird; and an allronomical clock, with a 

 iulum, made bv Mr. Shelton. 



M 



4i 



M 



May 13th to July 3d, during which time he was lucky 

 enough to make a great many ufeful obfcrvations ; fome 

 of the principal of which were the following, viz. — * 



Several meridian altitudes of the Sun and pole ftar; by 

 which the latitude of tlae Lizard Point was determined to 

 he ^if.Sf' 3o^N. 



The tranfit of Venus and eclipfe of the Sun viz.-^ 

 1769 Apparent time. 

 June 3d. 6". 



7 



V 



OL. 



L 



18. 



19. 57 



50'. 7'',4 External contad of Venus and the 



Sun, very exa£l:, the eye be- 

 ing fixed on the place. 

 B. ^5 Internal contad; doubtful to 4 or 



5", a cloud having hid Venus 

 fo long ; and at the cloud's go- 

 ing off, 2^^ after the time let 

 down, a thread of light appear- 

 ed very dilHn<fl: between the 



circumferences of the Sun and 

 Venus. 

 14. 54 fiegin. of the eclipfe of the Sunl »<">' 



17 End of the eclipfe. J good 



P •« Thefe 



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