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Army of the James - signaling by torches across James River from General Butler's head-quarters / sketched by William Waud.

[Signal station in Rocky Mountains-probably Rocky Mountain National Park]

[Signal station in the Rockies, showing telephone installation and signal man using heliograph]

Raspberry Island Light Station, Fog Signal Building, Bayfield, Bayfield County, WI

Outer Island Light Station, Fog Signal Building, La Pointe, Ashland County, WI

Signal station on the summit of Poney Mountain, near Culpepper [sic] Court House, Va.

Signal station on the summit of Poney Mountain, near Culpepper [sic] Court House, Va.

Signal Station. Pony Mt.

Signal Station. Pony Mt.

Signal Station. Pony Mt.

The signal station sketched near Culpeper C.H., Va. / Ed. Forbes

The signal station sketched near Culpeper C.H., Va. / Ed. Forbes

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building B, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building B, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building B, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building B, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building B, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Signal station on the south side of the Rappahannock River. Seen through a glass from the Union camps

Signal station on the south side of the Rappahannock River. Seen through a glass from the Union camps

Signal station on the south side of the Rappahannock River. Seen through a glass from the Union camps

Signal Station on Pony Mountain

Signal Station on Pony Mountain

Signal officers, in attic of farm house, watching the army of General Lee near Williamsport, Maryland

Signal officers, in attic of farm house, watching the army of General Lee near Williamsport, Maryland

Fort McDowell, Finance & Signal Office, Angel Island State Park, Angel Island, Marin County, CA

Fort McDowell, Finance & Signal Office, Angel Island State Park, Angel Island, Marin County, CA

Fort McDowell, Finance & Signal Office, Angel Island State Park, Angel Island, Marin County, CA

Fort McDowell, Finance & Signal Office, Angel Island State Park, Angel Island, Marin County, CA

[Savannah, Ga., vicinity. Signal station on the Ogeechee at Fort McAllister]

[Savannah, Ga., vicinity. Signal station on the Ogeechee at Fort McAllister]

[Savannah, Ga., vicinity. Signal station on the Ogeechee at Fort McAllister]

Nevada Test Site, Frenchman Flat Test Facility, Main Switching Bunker, Intersection of 5-03 Road & Short Pole Line Road, Area 5, Frenchman Flat, Mercury, Nye County, NV

Nevada Test Site, Frenchman Flat Test Facility, Main Switching Bunker, Intersection of 5-03 Road & Short Pole Line Road, Area 5, Frenchman Flat, Mercury, Nye County, NV

Nevada Test Site, Frenchman Flat Test Facility, Main Switching Bunker, Intersection of 5-03 Road & Short Pole Line Road, Area 5, Frenchman Flat, Mercury, Nye County, NV

Manitou and vicinity - U.S. Signal Station, summit Pike's P[ea]k

Manitou and vicinity - U.S. Signal Station, summit Pike's P[ea]k

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building A, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Glenn L. Martin Company, Titan Missile Test Facilities, Control Building A, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

Air Force Plant PJKS, Systems Integration Laboratory, Signal Transfer Building, Waterton Canyon Road & Colorado Highway 121, Lakewood, Jefferson County, CO

On the trail to Pike's Peak, from Bear Creek Canon to the summit, 14 miles - U.S. Signal Station, 14336 feet

On the trail to Pike's Peak, from Bear Creek Canon to the summit, 14 miles - U.S. Signal Station, 14336 feet

Signal Station, Hilton Head, South Carolina, 1863 / photographed and for sale by H. P. Moore, Concord, N.[H].

Signal Station, Hilton Head, South Carolina, 1863 / photographed and for sale by H. P. Moore, Concord, N.[H].

[Washington, D.C. Central Signal Station, Winder Building, 17th and E Streets NW, and Signal Corps men]

[Washington, D.C. Central Signal Station, Winder Building, 17th and E Streets NW, and Signal Corps men]

[Signal officers watching the camps of Gen. Lee's army on the south side of the Rapidan River, from the signal station on Poney Mountain] / E.F.

[Signal officers watching the camps of Gen. Lee's army on the south side of the Rapidan River, from the signal station on Poney Mountain] / E.F.

[Signal officers watching the camps of Gen. Lee's army on the south side of the Rapidan River, from the signal station on Poney Mountain] / E.F.

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