Letter

 1 XIII|  naturally improve upon every system. St. Bernard, as Father
 2 XIV |    destroyer of the Cartesian system, died in March, anno 1727.
 3 XIV | during some years, a complete system of physics; but now all
 4 XIV |    much as the beginning of a system. In fathoming this abyss
 5 XV  |     reputation, relate to the system of the world, to light,
 6 XV  |     ideas. With regard to the system of our world disputes were
 7 XV  |     surface of the earth.~The system of Descartes, explained
 8 XV  |    according to the Cartesian system. But the theorist, before
 9 XV  |       agree, anyhow, with his system. Sir Isaac, however, chose
10 XV  |     is necessary to prove the system of attraction.~The instant
11 XV  |       centre of the planetary system) attracts them all in a
12 XV  |    Bernoulli concluded by his system than the famous comet of
13 XVII|     calculation than in their system of natural philosophy. As
14 XVII|   know whether this ingenious system will be favourably received;
15 XVII|   fell upon his chronological system. Time, that should discover