sources of pleasure are of the highest intellectual nature; with the magnificent spectacle of their own rings and moons revolving round them, with the various combinations required to understand and predict the relations of these wonderful phenomena their minds are in unceasing activity and this activity is a perpetual source of enjoyment. Your view of the solar system is bounded by Uranus, and the laws of this planet form the ultimatum of your mathematical results; but these beings catch a sight of planets belonging to another system and even reason on the phenomena presented by another sun. Those comets, of which your astronomical history is so imperfect, are to them perfectly familiar, and in their ephemerides their places are shown with as much accurateness as those of Jupiter or Venus in your almanacks; the parallax of the fixed stars nearest them is as well understood as that of their own sun, and they possess a magnificent history of the changes taking place in the heavens and which are governed by laws that it would be vain for me to attempt to give you an idea of. They are acquainted with the revolutions and uses of comets; they understand the system of those meteoric formations of stones which have so much astonished you on earth; and they have histories in which the gradual changes of nebulas in their progress towards systems have been registered, so that they can predict their future changes. And their astronomical records are not like yours which go back only twenty centuries to the time of Hipparchus; they embrace a period a hundred times as long, and their civil history for the same time is as correct as their astronomical one. As I cannot describe to you the organs of these wonderful beings, so neither can I show to you their modes of life; but as their highest pleasures depend upon intellectual pursuits, so you may conclude that those modes of life bear the strictest analogy to that which on the earth you would call exalted virtue. I will tell you however that they have no wars, and that the objects of their ambition are entirely those of intellectual greatness, and that the only passion that they feel in which comparisons with each other can be instituted are those dependent upon a love of glory of the purest kind. If I were to show you the different parts of the surface of this planet, you would see marvellous results of the powers possessed by these highly intellectual beings and of the wonderful manner in which they have applied and modified matter. Those columnar masses, which seem to you as if arising out of a mass of ice below, are results of art, and processes are going on in them connected with the formation and perfection of their food. The brilliant coloured fluids are the results of such operations as on the earth would be performed in your laboratories, or more properly in your refined culinary apparatus, for they are connected with their system of nourishment.