Page:The Mathematical Principles of Natural Philosophy - 1729 - Volume 1.djvu/18

 ''found out after the ret, I choe to inert in places les uitable, rather than change the number of the propoitions and the citations. I heartily beg that what I have here done may be read with candor; and that the defects I have been guilty of upon this difficult ubject may be not o much reprehended as kindly upplied, and invetigated by new endeavors of my readers.''
 * Cambridge, Trin. College,
 * May 8. 1686.

''In the econd Edition, the econd Section of the firt book was enlarged. In the eventh Section of the econd Book the theory of the reitances of fluids was more accurately invetigated, and confirmed by new experiments. In the third Book, the Moon's Theory and the Præceion of the Æquinoxes were more fully deduced from their principles; and the theory of the Comets was confirmed by more examples of the calculation of their orbits, done alo with greater accuracy.''