134 Col. Beaufoi/'s Calculations of the Annular Eclipse. [Feb. 



being desirable to have corresponding observations on so rare a 

 phenomenon, I have, with the hope of directing the view of 

 others towards this object, sent you my calculations of the parti- 

 cular appearances at this place, as v/ell as the prijuipal appear- 

 ances in other parts of the world. By a mean of several 

 observations of the circumpolar stars, made with an excellent 

 circular instrument, two feet in diameter, and constructed 

 by Mr. Gary, I find the latitude of my Observatory to be 

 51° 37' 44-27" N. and longitude W. in time, 1' 20-93" instead of 

 51° 37' 42", and V 20-7" as shown hy Hadley's sextant, and an 

 artificial quicksilver horizon. I remain, my dear Sir, 



Yours very truly, 



Mark Beaufoy. 



Solar eclipse, Sept. 7, 1820. 

 Bushey Heath, lat. 51° 37' 44-27" N. ; long.W. in time, 1' 20-93' 



Apparent Time. 



Beginning 0'» 21' 60-0" 



Visible conjvmction 1 48 23*0 



Echptic conjunction 1 50 18-6 



Greatest obscuration 1 51 12-0 



End 3 12 07-0 



// 



Nearest approach of centres, 3' 02". Digits echpsed on the 

 «un's northern limb, 10° 28' 08". Moon makes the first impres- 

 Jiion on the sun's disc 54° 48' from the vertex on the right. 



Places on the Earth ivhere the pri)icipal Appearances of the Solar 



Eclime occur. 



Apparent Time at Greenwich. 



JBclipse begins al suii-rise. . . 

 Sun rises centrally cclipied. . 

 Sun centrally eclipsed mi (he 



meridian 



Sun eclipsed at the true con- 



junclioii 



Sun eclipsed at the middle of 



the transit 



Sun sets centrally eclijised . . 

 Kclipse endij at sun-setling . . 



A. T. at Greenwich. 



Ill" 22' 0"!" A.M, 



12 .51 09 P. M, 



1 08 09 P. M 



1 51 39 P. M 



2 01 34 P. M 



3 09 00 P. M 



4 41 02 P.M 



Latitude. 



59° 3S' 34" jN 



SI 35 42 N 



75 50 18 N 



o5 00 14 N 



51 18 56 N 



-n 01 21 N 



3 13 10 N 



Lonsitude. 



90° ol' 30" W 



148 50 36 W 



n 02 07 W 



6 03 36 E 



8 36 02 E 



45 49 W E 



20 05 03 E 



Duration of the echpse, 5'" 18' 5S' 



