Letter

 1 XII|       light, the number of our planets, &c. And a man who maintained
 2 XII|     and the ocean, between the planets, &c. In another place he
 3 XV |       the cause that turns the planets, and keeps them in their
 4 XV |   earth, the revolution of the planets in their orbits, their rotations
 5 XV |    west to east, since all the planets are carried from west to
 6 XV |   subtile matter, in which the planets are carried round the sun:
 7 XV |    which turns daily round the planets. When all this is done,
 8 XV |    both that which carries the planets round the sun, as well as
 9 XV |         He proves, that as the planets make their revolutions in
10 XV | naturally that the rest of the planets are equally subject to it?
11 XV |        motion.~The rest of the planets must be subject to this
12 XV |      if this law exists, these planets must follow the laws which
13 XV |     are indeed observed by the planets with the utmost exactness;
14 XV |      attraction causes all the planets to gravitate towards the
15 XV |        and inequalities of the planets, he subjects comets to the
16 XV |      to nourish and vivify the planets, which imbibe in their course
17 XV |  central forces alone keep the planets and comets in their orbits,
18 XV |    other cause which keeps the planets in their orbits than that
19 XV |        central forces; and the planets finishing their course according