round displays

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Calculating machines 1 - Public domain book illustration
Demonstrating fusee use

Demonstrating fusee use

A brakeman for the w:Indiana Harbor Belt Railroad, in January 1943, demonstrates a signal indicating "stop" with a fusee.

Indiana Harbor Belt Railroad switchman signaling "stop", Calumet City, Illinois, 1943 (LOC fsac.1a34695)

Indiana Harbor Belt Railroad switchman signaling "stop", Calumet City,...

Indiana Harbor Belt RR, switchman demonstrating signal with a "fusee" - used at twilight and dawn - when visibility is poor. This signal means "stop." Calumet City, Ill.

Indiana Harbor Belt RR, switchman demonstrating signal with a fusee 1a34694v

Indiana Harbor Belt RR, switchman demonstrating signal with a fusee 1a...

Title: Indiana Harbor Belt RR, switchman demonstrating signal with a "fusee" - used at twilight and dawn - when visibility is poor. This signal means "back up." Calumet City, Ill.

Indiana Harbor Belt RR, switchman demonstrating signal with a fusee 1a34695v
SC195 Molina and Johnson

SC195 Molina and Johnson

Album cover for Molina and Johnson, Secretly Canadian SC195

Switchman

Switchman

"Indiana Harbor Belt RR, switchman demonstrating signal with a "fusee" - used at twilight and dawn - when visibility is poor. This signal means "stop." Calumet City, Ill." color transparency

Dial Plate ofClock for theChineseMarket1852

Dial Plate ofClock for theChineseMarket1852

Dial Plate of Clock for the Chinese Market (1852)

Baro 7
Dial Plate ofClock for theChineseMarket1852

Dial Plate ofClock for theChineseMarket1852

Picryl description: Public domain image of a portrait of a cardinal, Catholic church priest, free to use, no copyright restrictions.

Electrical meter

Electrical meter

Public domain photograph of electric meter, free to use, no copyright restrictions image - Picryl description

Yiheyuan yacht Yonghe 4