272 



TRANSIT OF VENUS, 1874. EGYPT. 



TABLE IV. COMPARISON at PORTHCURNO of the Chronometers C. FRODSHAM 3205 

 (Mean Solar) and REID AND SONS 1207 (Sidereal), by Coincidence of Beats, 

 for Determination of the ERROR of REID AND SONS 1207 on G-REENWICH 

 SIDEREAL TIME. 



