STATIONS NEAR THE NORTHERN BOUNDARY OF OHIO. 



Q55 



Station No. 3. South Bend, Lake Michigan. 



Date. 

 1835. 



Limb. 



Observatory com- 

 pared with 



Date. 



Limb. 



Resulting 

 Longitude. 



W for 

 each com- 

 parison. 



Mean Result 

 for each day. 



W for 

 each day. 













h. m. S. 





h. m. s. 





Aug. 31 





Edinburgh 



31 





5 49 27-3 



0-00326 







31 





Cambridge 



31 





21-3 



0-00244 



5 49 24-73 



0-00414 



Sept. 1 





Cambridge 



1 





19-4 



0-00288 



19-40 



0-00288 



2 





Greenwich 



2 





12-6 



0-00324 







2 





Cambridge 



2 





20-5 



0-00324 







2 





Cracow 



2 





10-4 



0-00365 



14-33 



0-00608 



3 





Kremsmunster 



3 





16-7 



0-00332 







3 





Dorpat 



3 





18-5 



0-00307 



17-56 



0-00459 



4 





Edinburgh 



5 





25-6 



0-00194 







4 





Greenwich 



5 





14-0 



0-00194 







4 





Cracow 



5 





8-5 



0-00346 







4 





Dorpat 



4 





14-3 



0-00-294 



14-42 



0-00432 



6 



I&II 



Edinburgh 



6 



I&II 



231 



0-00351 







6 



I&II 



Cambridge 



6 



I&II 



16-6 



0-00293 



20-14 



0-00355 



7 



II 



Cambridge 



7 



II 



14-8 



0-00135 







7 



11 



Dorpat 



7 



II 



23-2 



0-00157 



19-32 



0-00245 



8 



II 



Greenwich 



8 



II 



25-6 



0-00127 







8 



II 



Dorpat 



8 



II 



26-0 



0-00134 



25-81 



0-00173 













h. m, s. 







Final 



Result, South B 



end "\ 



Vest of Greenwich, 



5 49 18-55 



0-02974 





Prob: 



ible error, 







f 1-74 





SECTION IX. 



The longitudes of these stations may perhaps require a further correc- 

 tion for the comparative irradiation of Captain Talcott's and the Eu- 

 ropean transit instruments. This subject, though frequently discussed, 

 is still left in uncertainty. Corresponding observations, with tele- 

 scopes of different optical capacity, indicate that the apparent diameter 

 of the moon is subject to a small variation, depending upon this ca- 

 pacity, and upon the degree of illumination of the wires. If this were 

 the only effect of irradiation, it could be easily allowed for by reducing 

 VI.— 3 o 



