Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Communications, Telephone Exchange.

Telephone, New York Telephone Co. Exchanges.

Telephone, New York Telephone Co. Exchanges.

Telephone, New York Telephone Co. Exchanges.

Communications, Telephone Exchange.

Telephone Exchange 1896 Cortlandt St. West Wing.

[Telephone Exchange 1896 Cortlandt St. West Wing.]

[Telephone operators.]

[Telephone operators.]

[Telephone operators.]

[District selector frame in a dial exchange.]

Siegel Cooper, Sixth Ave. & 18th Street.

Residence, Mrs. Paran Stevens, N.E. 57th & 5th Ave. Leader of 400.

Siegel Cooper, Sixth Ave. & 18th Street.

Siegel Cooper, Sixth Ave. & 18th Street.

Communications, Marconi's Wireless Telegraphing Apparatus.

Communications, Marconi, Wireless Telegraph Inc.