1. That the square-Contents of the Sun’s surface is greater than that of the surfaces of all the Planets taken together. 2. That the square-Contents of the Earth’s surface is nearly as large as that of the surfaces of Mercury and Venus taken together. [Illustration: _N^o. IV._ ] 3. That the square-Contents of the surfaces of Vesta, Ceres, Juno and Pallas, taken together, is not yet sufficient to cover the surface of our Earth. 4. That the square-Contents of Jupiter’s surface is larger than that of the surface of any other Planet. 5. That the square-Contents of Jupiter’s surface is greater than that of the surfaces of all other Planets taken together. 6. That Saturn’s surface is the next largest. 7. That Herschel’s is still larger than those of our Earth, Venus and Mercury taken together. 8. That the square-Contents of the Moon is nearly as large as that of the surfaces of Ceres, Vesta and Juno, taken together; and that it is larger than that of Pallas’ surface taken alone. In order that you may be better able to compare, you will find on Plate No. V 1. The surfaces of the different Planets, all drawn upon the Sun’s surface; from which you may see, how much larger the Sun’s surface is than the surfaces of all the Planets and the Moon taken together. 2. The surface of the Earth compared to that of Mercury and Venus. 3. The Earth’s surface compared to that of the Four Asteroids Pallas, Ceres, Juno and Vesta. 4. Jupiter’s surface compared to those of all the other Planets. 5. The square-Contents of the Moon compared to the surfaces of Vesta, Juno and Ceres. 6. Herschel’s square-Contents compared to that of our Earth, Venus and Mercury taken together. § 13. The Four Planets, Ceres, Vesta, Juno, and Pallas, are so small in proportion to the other Planets, and are so near each other (they are almost at the same distance from the Sun—see Plate II) that many distinguished philosophers are of opinion, they are but the fragments of One large Planet, which, from some cause or other, has _burst_.—But this is no subject for us now to inquire into;—we will therefore proceed to describe in the next lesson, the motion of the different Planets round the Sun. [Illustration: _N^o. V._ ] RECAPITULATION OF LESSON II. QUESTIONS. [§ 8.] What are the names of the Eleven Planets _in the order in which they are placed from the Sun_? How many Planets are there between the Earth and the Sun? How many Planets come after our Earth? In what order then, is our Earth placed among the Planets? (Is it the first, second, etc. from the Sun)? [§ 9.] How many satellites accompany our Earth? What is it called? How many satellites or Moons has Jupiter? How many has Saturn? How many has Herschel? By what is Saturn particularly distinguished from all other Planets?