EHR^T^. 



Page 471j for " quartermores " read " quarternions." 



Page 661, 15th line, for "aerial" read "axial." 



Page 662, 30th line, for "Mars" read "Uranus." 



Page 664, 1st line, for "therefore " read "heretofore;" in 10th line for "on" read 

 "over." 



Page 719, 9th line, for "Wolft" read " Wolflf." 



Page 720, 5th line from the bottom, after " how " add " the velocity of light by meana 

 of the eclipses of the moons of." 



Page 721, 4th line, for "fitted" read "filled." 



Page 725, 8th line from the bottom, for " orator " read " author." 



Page 811, 6th line from the bottom, for " indentity " read "identity." 



Page 813, 9th line, for "portions" read "positions." 



