See a description of this machine by Diderot, in the Encyc. Method.; also in the works of Pascal, tom. IV., p. 7; Paris, 1819.

Equidem Morelandus in Anglia, tubæ stentoriæ author, Rhabdologiam ex baculis in cylindrulos transtulit, et additiones auxiliares peragit in adjuncta machina additionum Pascaliana.

Tom. I., p. 317.

Com. Epist. tom. I., p. 289.

Sed machinam esse sumptuosam et multarum rotarum instar horologii: Huygenius aliquoties admonuit ut absolvi curarem; quod non sine magno sumptu tædioque factum est, dum varie mihi cum opificibus fuit conflictandum.—Com. Epist.

Government has erected a fire-proof building, in which it is intended that the calculating machinery shall be placed when completed. In this building are now deposited the large collection of drawings, containing the designs, not only of the part of the machinery which has been already constructed, but what is of much greater importance, of those parts which have not yet been even modelled. It is gratifying to know that Government has shown a proper solicitude for the preservation of those precious but perishable documents, the loss or destruction of which would, in the event of the death of the inventor, render the completion of the machinery impracticable.