27 miles of pneumatic tubing
to transport 97,000 letters a day
at 30 miles per hour
for more than 50 years

6 feet under.

A whole transportation system
sandwiched between
ambulance sirens
and subway trains.

From 1897 to 1953,
rocketeers handled
the 25-pound steel cannisters.
Even a cat got sent through.

Whoosh.