666 
ARTICLE XXIX. 
Sketch of the Analytical Engine invented by Charles Babbage 
Esg. By L. F. Menasrzea, of Turin, Officer of the Mili- 
tary Engineers. 
[From the Bibliothéque Universelle de Généve, No. 82. October 1842.] 
[ BEFORE submitting to our readers the translation of M. Me- 
nabrea’s memoir ‘ On the Mathematical Principles of the ANALY- 
TICAL ENGINE’ invented by Mr. Babbage, we shall present to 
them a list of the printed papers connected with the subject, 
and also of those relating to the Difference Engine by which it 
was preceded. 
For information on Mr. Babbage’s “ Difference Engine,” which 
is but slightly alluded to by M. Menabrea, we refer the reader to 
the following sources :— 
1. Letter to Sir Humphry Davy, Bart., P.R.S., on the Appli- 
cation of Machinery to Calculate and Print Mathematical Tables. 
By Charles Babbage, Esq., F.R.S. London, July 1822. Re- 
printed, with a Report of the Council of the Royal Society, by 
order of the House of Commons, May 1823. 
2. On the Application of Machinery to the Calculation of 
Astronomical and Mathematical Tables. By Charles Babbage, 
Esq.—Memoirs of the Astronomical Society, vol. i. part 2. Lon- 
don, 1822. 
3. Address to the Astronomical Society by Henry Thomas 
Colebrooke, Esq., F.R.S., President, on presenting the first Gold 
Medal of the Society to Charles Babbage, Esq., for the inven- 
tion of the Calculating Engine.—Memoirs of the Astronomical 
Society. London, 1822. 
4. On the Determination of the General Term of a New Class 
of Infinite Series. By Charles Babbage, Esq.—Transactions of 
the Cambridge Philosophical Society. 
5. On Mr. Babbage’s New Machine for Calculating and Print- 
ing Mathematical Tables.—Letter from Francis Baily, Esq., 
F.R.S., to M. Schumacher. No. 46, Astronomische Nachrichten. 
Reprinted in the Philosophical Magazine, May 1824, 
6. On a Method of expressing by Signs the Action of Ma- 
