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Iron borings coherer (Branly type), 1894

Iron borings coherer (Branly type), 1894

1894
Branly tripod coherer, 1900-1910

Branly tripod coherer, 1900-1910

1900-1910
Iron borings coherer (Branly type), 1894

Iron borings coherer (Branly type), 1894

1894
Coherer, one of two

Coherer, one of two

1885-1940
Two iron boring coherers (Branly type), 1894

Two iron boring coherers (Branly type), 1894

1894
Coherer, one of two

Coherer, one of two

1885-1940
Magnetic circuit with variable air-gap, Branly collection no. 34

Magnetic circuit with variable air-gap, Branly collection no. 34

Ammeter shunt, 6 way, Branly collection no. 27

Ammeter shunt, 6 way, Branly collection no. 27

Brass cylinder, possibly containing electrical coil, Branly collection

Brass cylinder, Branly collection

Charcoal resistance, Branly collection 10a

Charcoal resistance, Branly collection 10