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TRANSIT VELOCITY—GENERAL AND PARTIAL MEANS.
are much more important and true. These, so far as our results admit of them, are—
| Transit Velocity in Feet per Second. | |
| Barielle and Atella, mean transit rate, through highly inclined and shattered, but elastic limestone formations, chiefly with about three miles' volcanic formations at the remote extremity | 739·4 |
| Melfi, same line, but about nine miles of volcanic formations, at the remote extremity | 658·2 |
| Salerno, through about a mean of the mountainous districts as to formation; upper and lower limestones, some highly inclined, others more flatly bedded, plain of four miles of deep clays, and calcareous districts at the remote extremity | 874·3 |
| Naples, through the deep deposits of tufa, and other volcanic products, of the Terra di Lavoro | 706·6 |
| Monte Peloso, through about one-half the range, highly inclined and clastic but shattered rocks, chiefly the lower limestones. The remainder, through the less-inclined, flat-bedded tertiaries, of the murgie, hard, and more continuous formation | 989·4 |
The extremes are, in round numbers, from 1000 feet per second, in the best transmitting, to 700 feet per second, in the worst transmitting formations.
