.
The series of operations commanded by the cards, and the results obtained, may be represented in the following table:—
| Number of the operations. | Operation-cards | Cards of the variables. | Progress of the operations. | |
|---|---|---|---|---|
| Symbols indicating the nature of operations. | Columns on which operations are to be performed. | Columns which receive results of operations. | ||
| 1 |  |  |  |  |
| 2 | |  |  |  |
| 3 | |  |  |  |
| 4 | |  |  |  |
| 5 |  |  |  |  |
| 6 | |  |  |  |
| 7 |  |  |  |  |
Since the cards do nothing but indicate in what manner and on what columns the machine shall act, it is clear that we must still, in every particular case, introduce the numerical data for the calculation. Thus, in the example we have selected, we must previously inscribe the numerical values of
,
,
