Bernochi, [7], [112]

system of, [7], [34]

Berzelius, [109]

Bichromate of potash, [120]

Blondel's oscillograph, [47]

Camera obscura, [136]

extension, [116], [118]

choice of, [117]

Capacity of condenser, [24], [78]

electrostatic, [3], [5]