+-----+-------+----------+--------+----------+----------+-----------+ In this Table the _length_ means the extreme length of the bone as measured from the summit of the spinous process to the point of the internal malleolus; and the numbers in the fifth column represent the antero-posterior and the transverse diameter of the shaft at the point where the popliteal line terminates at the inner border of the bone, which is usually about an inch and a half below the nutritive foramen. The _latitudinal_ index represents the relation that the transverse diameter bears to the antero posterior, and it is employed to indicate, with some degree of precision, the actual amount of compression or flattening of the shaft as compared with the normal form, which may, so far as my observations show, be taken for the ordinary English _tibiæ_ as from ·700 or ·800, or in the mean at ·730, as will be seen in the subjoined Table, which contains the proportions of thirteen leg-bones taken indiscriminately from a drawer in the College of Surgeons. TABLE III.--_Proportions, &c., of ordinary Tibiæ._ +-----+-------+----------+--------+----------+----------+-----------+ | | | | | Antero- | | | | | |Transverse| |posterior | | | | | | diameter,| Least | diameter |Perimetral|Latitudinal| | No. |Length.| proximal |circum- | and | index. | index. | | | | end. |ference.|transverse| | | | | | | | diameter | | | | | | | | of shaft.| | | +-----+-------+----------+--------+----------+----------+-----------+ | | | | | | | | | 1. | 16·7 | 3·15 | 3·4 | 130 × 100| ·202 | ·769 | | 2. | 16·4 | 3·2 | 3·5 | 150 × 115| ·213 | ·766 | | 3. | 15·8 | 2·95 | 3·0 | 120 × 90 | ·189 | ·750 | | 4. | 15·5 | 2·95 | 2·9 | 140 × 90 | ·122 | ·642 | | 5. | 15·3 | 2·9 | 2·8 | 130 × 90 | ·150 | ·692 | | 6. | 15·2 | 3·0 | 3·2 | 140 × 90 | ·213 | ·642 | | 7. | 15·0 | 2·8 | 2·8 | 140 × 90 | ·187 | ·642 | | 8. | 15·0 | 2·6 | 2·8 | 120 × 85 | ·187 | ·709 | | 9. | 15·0 | 2·6 | 2·8 | 120 × 90 | ·187 | ·782 | | 10. | 15·5 | 3·0 | 2·9 | 120 × 95 | ·193 | ·791 | | 11. | 13·5 | 2·8 | 2·9 | 120 × 90 | ·214 | ·750 | | 12. | 13·4 | 2·75 | 2·7 | 120 × 85 | ·201 | ·708 | | 13. | 12·8 | 2·5 | 2·4 | 100 × 85 | ·187 | ·850 | +-----+-------+----------+--------+----------+----------+-----------+ | | | | | | | |