47. Abstract of a Paper, entitled Observations on the Temple of Serapis, at Pozzuoli, near Naples; with an attempt to explain the causes of the frequent elevation and depression of large portions of the earth’s surface in remote periods, and to prove that those causes continue in action at the present time. Read at Geological Society, 12 March, 1834. See Abstract of Proceedings of Geol. Soc. Vol. ii. p. 72.
This was the first printed publication of Mr. Babbage’s Geological Theory of the Isothermal Surfaces of the Earth.
48. The Paper itself was published in the Proceedings of the Geological Soc. 1846.
49. Reprint of the same, with Supplemental Conjectures on the Physical State of the Surface of the Moon. 1847.
50. Letter from Mr. Abraham Sharpe to Mr. J. Crosthwait, Hoxton, 2 Feb. 1721–22. Deciphered by Mr. Babbage. See Life of Flamsteed, by Mr. F. Baily. Appendix, pp. 348, 390. 1835.
51. The Ninth Bridgewater Treatise. 8vo. May, 1837; Second Edition, Jan. 1838.
52. On some Impressions in Sandstone.—Proceedings of Geological Society. Vol. ii. p. 439. Ditto, Phil. Mag. Ser. 3. Vol. x. p. 474. 1837.
52*. Short account of a method by which Engraving on Wood may be rendered more useful for the Illustration and Description of Machinery.—Report of Meeting of British Association at Newcastle. 1838. P. 154.
53. Letter to the Members of the British Association. 8vo. 1839.
54. General Plan, No. 25, of Mr. Babbage’s Great Calculating or Analytical Engine, lithographed at Paris. 24 by 36 inches. 1840.