OF THE SUNT, JUNE Iff, 1806. '265 



ought (o have happened 4 U 29' 40" 8, mean time in Paris, 

 latitude of the moon in conjunction 19' 19" N. 



Latitude of Albany 40° 42' 38". Longitude east of New- 

 York, according to the chronometer, No. 63, in time = 58", 

 the maximum of the total obscurity ought to have taken place 

 in latitude 42° 23' on the bank of the North river. — The fol- 

 lowing are the results of an approximated calculation. 



u > " 



Beginning of the eclipse in mean time. 9 49 00 ~\ Fh . st contact 45 „ tQ the 



Ditto ot total obscurity. . . . 11 06 o0 f left of ^ iufel . ior ye 



End of total obscurity. . . . " ^ ^ C by inverse vision. 



End of the eclipse U Jj 00 J ' 



On the 8th of June I embarked in a packet for Kinderhook 

 south landing, which is 15 geographic miles south of Albany 

 on the bank of the river Hudson, to observe the eclipse, tak- 

 ing for that purpose an excellent chronometer of Arnold, No. 

 63; a circle of reflection; and an achromatic telescope, con- 

 structed by Troughton according to particular directions. 



The circle of reflection is not a multiplier, it is 11 English inch- 

 es diameter, graduated upon silver, with three indexes, which di- 

 vide the circle into three equal parts, and sub-divide it to 10"; 

 mounted on a pedestal, and the telescope magnifies 17 times. 

 A complete, or double observation is a compound of two ob- 

 servations, one direct, the other inverse, each observation has 

 three readings, consequently the error of the divisions, in the 

 double observations, is reduced to f, the eccentricity destroyed, 

 as also the error of the index, coloured glasses, small speculum, 

 and of almost the whole of the large one. 



The telescope is 4f feet in length, it has a triple object glass 

 of 2 /,?„ . inches aperture, a terrestrial eye glass, and three astro, 

 nomical ones No. 1, 2, 3, and from the manner in which it is 

 mounted, the zenith may be observed with as much exactness 

 as any other elevation. 



Rate of going of the chronometer in New-York. 



June 4th, slower than meantime. . 11 16 5T 



6th, . . . 11 17 OV. mean daily loss = 0" 5 



8th, . . 11 18 53 



2M 



