Newton, Isaac (1729). The mathematical principles of natural philosophy. Vol. 2. p. 307. ISBN978-0-11-772880-6., Book 3, Proposition 36, Page 307 Newton put the force to depress the sea at places 90 degrees distant from the Sun at "1 to 38604600" (in terms of g), and wrote that the force to raise the sea along the Sun-Earth axis is "twice as great" (i.e., 2 to 38604600) which comes to about 0.52 × 10−7g as expressed in the text.
Newton, Isaac (1729). The mathematical principles of natural philosophy. Vol. 2. p. 307. ISBN978-0-11-772880-6., Book 3, Proposition 36, Page 307 Newton put the force to depress the sea at places 90 degrees distant from the Sun at "1 to 38604600" (in terms of g), and wrote that the force to raise the sea along the Sun-Earth axis is "twice as great" (i.e., 2 to 38604600) which comes to about 0.52 × 10−7g as expressed in the text.