[45] In the _Ninth Bridgewater Treatise_, Mr. Babbage has employed various arguments deduced from the Analytical-Engine, which afford some idea of its powers. See second edition. In 1838, several copies of plans of this new engine, engraved on wood, were circulated amongst Mr. Babbage’s friends at the Meeting of the British Association at Newcastle. In 1840, Mr. Babbage had one of his general plans of the Analytical-Engine lithographed at Paris. [46] I am authorized by Lord Lovelace to say, that the translator is Lady Lovelace. [47] “The Difference-Engine could only tabulate, and was incapable by its nature of developing; the Analytical-Engine was intended to either tabulate or develop. The Difference-Engine is the embodying of one particular and very limited set of operations, the Analytical-Engine, the embodying of the science of operations. The distinctive characteristic of the Analytical-Engine, is the introduction into it of the principle which Jacquard devised for regulating by means of punched cards the most complicated patterns in the fabrication of brocaded stuffs. Nothing of the sort exists in the Difference-Engine. We may say most aptly, that the Analytical-Engine weaves _Algebraical patterns_, just as the Jacquard loom weaves flowers and leaves!”—Note to translation of Menabrea’s Memoir. The 59th volume of the _Edinburgh Review_ contains an able and elaborate article upon the Difference-Engine, written by Dr. Lardner. [48] Mr. Babbage has shown me letters by which it appears that he declined offices of great emolument, the acceptance of which would have interfered with his labours upon the Difference-Engine. The annexed Review of the Eleventh Chapter of MR. WELD’S HISTORY OF THE ROYAL SOCIETY, by Professor DE MORGAN, has been reprinted with his permission, and that of the Editor, _verbatim_, from the Athenæum of October 14th, 1848. Three Notes at the foot of the pages have been added for the purpose of explanation. These are followed by the remarks upon them, reprinted from the “_Athenæum_” of 16th December, 1848. PROFESSOR DE MORGAN’S REVIEW _of_ WELD’S HISTORY _of the_ ROYAL SOCIETY. --------------- THE ATHENÆUM. _LONDON, SATURDAY, OCTOBER 14, 1848._ --------------- MR. BABBAGE’S CALCULATING MACHINE.