[3] In an article on the subject in the Dundee Evening Telegraph, Mr. Robertson observes: "If our finite minds were more capable of comprehension, what a glorious view of the grandeur of the Deity would be displayed to us in the contemplation of the centre and source of light and heat to the solar system. The force requisite to pour such continuous floods to the remotest parts of the system must ever baffle the mind of man to grasp. But we are not to sit down in indolence: our duty is to inquire into Nature's works, though we can never exhaust the field. Our minds cannot imagine motion without some Power moving through the medium of some subordinate agency, ever acting on the sun, to send such floods of light and heat to our otherwise cold and dark terrestrial ball; but it is the overwhelming magnitude of such power that we are incapable of comprehending. The agency necessary to throw out the floods of flame seen during the few moments of a total eclipse of the sun, and the power requisite to burst open a cavity in its surface, such as could entirely engulph our earth, will ever set all the thinking capacity of man at nought." [4] The Observatory, Nos. 34, 42, 45, 49, and 58. [5] We regret to say that Sheriff Barclay died a few months ago, greatly respected by all who knew him. [6] Sir E. Denison Beckett, in his Rudimentary Treatise on clocks and Watches and Bells, has given an instance or the telescope-driving clock, invented by Mr. Cooke (p. 213). [7] J. Norman Lockyer, F.R.S.--Stargazing, Past and Present, p. 302. [8] This excellent instrument is now in the possession of my son-in-law, Dr. Hartree, of Leigh, near Tunbridge. [9] An interesting account of Mr. Alvan Clark is given in Professor Newcomb's 'Popular Astronomy,' p. 137.