9i 



ACCOUNT OF THE METEOR SEEN IN CONNECTfCUT. 



Cwmt mull be corrected for terrestrwl refraction, by sub- 

 tracting one fourteenth part of the intercepted arches SM, 

 WiVI respectively; but as these arches are g^nernlly yn- 

 knoWn, it will be necessary (when great accuracy is required] 

 to make the calculation with the altitudes uncorrected, and 

 thus tind the approximate values of the corrections of the 

 altitudes for refraction, and, by repeating the operation, the 

 required quantities will be obtained. In this way the re- 

 fraction in the Wenhana observations was foiiod to be about 

 nine or tea minutes. 



' Exumple, 



Suppose the altitude of the meteor at the time of its dis- Exemplifies- 

 appearance at Weston was 75% its azimuth at that place ^*^° °^^^"^^' 

 Nl5*W, and the corresponding altitude of the meteor at 

 Wenham S^SO' corrected for refraction. It is required to 

 find the latitude and longitude of the meteor, its distance 

 from Wenham and Wefton, and its vertica} altitude above 

 the level of the sea. 



Here are given the angle Ctcwz:90'*^aU. at Wenham ri 

 9.5° 30', Cm=:90*'+ alt. at Weston n 165% Thearch SW 

 -<=f 24' 25", the angle PWS - l^ST 18' 38", and the angle 

 PSW — 52''56'34 ", are found as in the laft example. The 

 angles PSW, PSM, added together, give WSM or A^W 

 zz67°56'34". 



This corresponds to Example 14, Table 1. 





SW 



