[Men digging near Morris Park Office.]

[Worker digging a ditch.]

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

[Shaft of Ashokan Water Tunnel.]

Summit Mineral Spring Water

[Launching New York River Shaft Caisson.]

Summit Mineral Spring Water

[Placing side ring "upper half".]

[982 Summit Avenue.]

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

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

Summit Mineral Spring Water

Summit Mineral Spring Water

Penn. Depot Excavations.

Summit Mineral Spring Water. Delluc & Co., Pharmaceutists

[Digging in on biggest job.]

[Construction site on West Side.]

Shaft No. 4, Steinway Tunnel.

[Shaft 9A.]

[Tightening bolts.]