[35] The following is a list of the multipliers for converting the planimeter readings to square feet for any required scale:—
| 1/16-in. | scale | = | 256 | 5/16-in. | scale | = | 10·24 | 1-in. | scale | = | 1·00 |
| ⅛-in. | do. | = | 64 | ⅜-in. | do. | = | 7·11 | 1½-in. | do. | = | ·44 |
| 3/16-in. | do. | = | 28·44 | ½-in. | do. | = | 4·00 | 3-in. | do. | = | ·111 |
| ¼-in. | do. | = | 16 | ¾-in. | do. | = | 1·77 |
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