On Halloween Day, 1903, Scientific American had a cover story on the construction of The Harlem River Tunnel of the Rapid Transit subway.

The article detailed how (in soft sediment and clay) workers tunneled under the Harlem River from Manhattan to the Bronx, for the new subway line. Today we know it as the 4/5/6 line to The Bronx.

The construction method essentially consisted of moving inch by inch in the mud, and creating a concrete cover over the double-barrelled tunnel, and then covering that concrete with excavated mud. Somehow this project has stood the test of time - it's now 120 years old this year.

Lobby Art Exhibit

At 215 West 125th Street: