| Picard Surveyors' Measure (Year of 1668) |
| 1 picard link | = | 0.75 ft. | (1 foot link = 1 ft.) | |
| 1 french pole | = | 24 pic.lk. | (1 french po. = 18 ft.lk.) | |
| 1 french chain | = | 96 pic.lk. | (1 french ch. = 72 ft.lk. |
| 1 french furlong | = | 10 french ch. | (1 french fu. = 40 fr.po. = 120 fth. = 240 yd. = 720 ft.) |
| 1 french mile | = | 80 french ch. |
| 1 french pale | = | 576 pic.sq.lk. | (324 ft.sq.lk.) | |
| 1 french sq. chain | = | 9216 pic.sq.lk. | (5184 ft.sq.lk.) | |
| 1 french rood | = | 23,040 pic.sq.lk. | (12,960 ft.sq.lk.) |
| 1 french acre | = | 10 french sq.ch. | (1 french acre = 4 french po. x 40 french po.) |
| 1 french ml. | = | 60 right angle 3 x 4 x 5 triangles, 4 unit (the 96 ft.) sides laid end to end |
| 60 french ml. per hr. | = | 96 ft. per sec. |
| 1 french ml. | = | 5760 ft. | (80 x 72' = 5760')(60 x 96' = 7680')(48 x 120' = 5760') |
| 24' | = | 1 french ch. right angle triangle (18' x 24' x 30') perpendicular |
| 5760' | = | 240 french ch. right angle triangle (18' x 24' x 30') perpendiculars |
| 51,840 sq.' | = | 240 french ch. right angle triangle (18' x 24' x 30') areas |
| 51,840 sq.' | = | 1 french acre |
| 12,960 sq.' | = | 60 french ch. right angle triangle (18' x 24' x 30') areas |
| 12,960 sq.' | = | 1 french rood |
| 1 french sq. mile | = | 640 french acres | (6400 french sq.ch.) |
| • |
| 96 pic.lk. | = | 18 ft. + 24 ft. + 30 ft. | (72 ft.) (1 fr.ch.) |
| 96 pic.lk. | = | 1 fr.po. + 1 1/3 fr.po. + 1 2/3 fr.po. | (4 french po.) |
| 1 french po. | = | 24 pic.lk. | (18 ft.) |
| 96 pic.lk. | = | 24 pic.lk. + 32 pic.lk. + 40 pic.lk. | (24 yd.) (12 fth.) |
| 96 pic.lk. | = | 3x8 pic.lk. + 4x8 pic.lk. + 5x8 pic.lk. = 1 french ch. | (r/angle 3 x 4 x 5 triangle) |
| 7680 pic.lk. | = | 60 x 4 x 4 x 8 pic.lk. | (1 french ml.) |
| 7680 pic.lk. | = | 60 x 4 x 1 1/3 french po. | (320 french po.) |
| 7680 pic.lk. | = | 60 x 4 x 24 ft. | (5760 ft.) |
| 12 in. | = | 3 in. + 4 in. + 5 in. | (1 ft.) |
| 92160 in. | = | 60 x 288 x 4 in. | (1 french ml.) |
| LEATHER SEALER'S OFFICE, Londonderry, Vt. | April 8th 1826 | Rory Ely Cole |
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| Copyright © MMII Rory Ely Cole |