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Three Carriage Axes 3. Ten Table Figure Axes 4. Digit Counting Apparatus 5. Selecting Apparatus 6. Barrels 7. Reducing Apparatus for Barrels 8. Operation Cards 9. Repeating Apparatus 10. Combinatorial Counting Apparatus 19 1. Of the Figure Axes The Figure Axes A and 'A are connected with each other without the intervention of the central wheels so that a number on the figure wheels of one axis may be transferred to those of the other. These figure wheels are considerably larger than any others in order to allow of sufficient space on their circumference for placing the pinions by which communications are made with other parts of the mill.

He in fact never did build an analytical engine, though he designed, and in many cases built, various other devices to illustrate his concept of " automatics " , including two more calculating machines, an automatic weighing machine, and a machine for playing a game somewhat like the game of Nim. However there seems little reason to doubt that , should the need have been sufficiently pressing, TORRES would indeed have built a complete analytical engine . As we will see in later chapters, it was not until the 1939-1945 war that the desirability of large scale fully-automatic calculating machines became so clear that the necessary environment was created for BABBAGE's concept to become a reality.

The levers which put these sectors into action are acted upon by:a) The studs on their own barrel b) The studs on any other barrel c) The Operation cards d) The Running up levers. The first and third of these sources of action occur most frequently. 8. Of the Operation Cards Those who are acquainted with the cards of a Jacards loom will readily understand the functions performed by these cards. To those who are unacquainted with that beautiful contrivance it may be necessary to state that the Cards consist of pieces of thick paste board, tin plate or sheet zinc pierced with a number of holes; these cards being strung together by wire or tape hinges pass over a square prism.

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