Electric Bells and All About Them: A Practical Book for Practical Men

by Selimo Romeo Bottone

N.

• Negative electricity, [7]
• Non-conductors, [3]
• Novel musical instrument, [108]

O.

• Ohm, [55]
• Ohm's law, [55]
• Open circuit, [52]
• Overhead lines, [152]

P.

• Paraffin, [69], [170]
• Percha, gutta, [148]
• Plans, drawing out, [169]
• Platinum, riveting, [76]
• Platinum, use of, [76]
• Plug switches, [128]
• Polarisation, [26]
• Positive electricity, [7]
• Proportions of bell parts, table of, [89]
• Pressels, [111]
• Prout's elastic glue, [148]
• Pulls, [111]
• Push, [92], [151], [109]
• Interior of, [151]
• Joining wires to, [151]

R.

• Relay, [96], [133]
• Action of, [134]
• Repulsion, [3]
• Resinous electricity, [7]
• Resistance of wire, table of, [146]
• Return current, [153]
• Riveting platinum, [76]
• Rubbing action, [116]

S.

• Ships, bells for, [170]
• Shop door contact, [116]
• Signalling by bells, [130]
• Code, [130]
• Silver platinised, [27]
• Single cell, [9]
• Sizes of Leclanché's, [42]
• Smee's cell, [27]
• Spring coil, [108]
• Standard size of wires, [146]
• Switches, lever, [128]
• Plug, [128]