-----------+----------------+-----------------+---------------------+
Location. | Number of days | Total length of | Average length of |
| worked. | heading, in | heading driven per |
| | feet. | day worked, in feet.|
-----------+----------------+-----------------+---------------------+
| | | |
N.E. | 227 | 446 | 1.96 |
S.E. | 168 | 346 | 2.06 |
N.W. | 272 | 768 | 2.82 |
S.W. | 234 | 698 | 2.98 |
-----------+----------------+-----------------+---------------------+
_Progress at Hackensack._--At Hackensack the total number of days worked
on the tunnels proper, all in trap rock (omitting the cut and cover) was
about 792, divided as shown in Table 5.