[Men digging near Morris Park Office.]

[Worker digging a ditch.]

[Launching New York River Shaft Caisson.]

Summit Mineral Spring Water

[Shaft of Ashokan Water Tunnel.]

Summit Mineral Spring Water

[Digging in on biggest job.]

Penn. Depot Excavations.

[Digging subway tube under East River for Queensboro Subway.]

Penn. Depot Excavations.

[Tightening bolts.]

[The working chamber of the New York River Shaft Caisson.]

Subways, Fourteenth Street Cut for Subway, Rock Cut Looking West, Shaft 1.

[Placing side ring "upper half".]

Summit Mineral Spring Water

Summit Mineral Spring Water

Shaft No. 4, Steinway Tunnel.

[Construction site on West Side.]

[Shaft 9A.]

[982 Summit Avenue.]