Average of Meissner’s corpuscles to each square millimetre, which is approximately one five hundredth part of a square inch:—
| Palmar surface of distal phalanx of index finger | 21 |
| Palmar surface of second phalanx of index finger | 8 |
| Palmar surface of first phalanx of index finger | 4 |
| Palmar surface of metacarpus of little finger | 2 |
| Plantar surface of distal phalanx of great toe | 7 |
| Middle of sole of foot | 2 |
| Flexor surface of forearm in each sq. mm. | 1 |
| Distal end of flexor surface of forearm in each sq. mm.:— | |
| 1 to each 6 sq. mm. approximately. |
* Absent from the cornea, and conjunctiva of the upper eyelid and from the glans penis.
Table III.—Distribution of Touch Spots:—
These must be distinguished, of course, from the touch corpuscles of the preceding list and the subjective element in the study of them must be borne in mind.
If an area, as of the calf of the leg, be prepared, by cutting short the small hairs, and examined, it is found that there are about 15 touch spots in each square centimetre, which is about one-fifth of a square inch.
In another area so treated the hairs are counted and the following result is given:—
1.
On the dorsal surface of the forearm 78 touch spots are found in an area containing 15 hairs.
2.