receiver
transmitter
Automatic shunt

B

Bar electromagnet
Battery bell
Battery symbols
Blake single electrode
Brazed bell
Broken-back ringer
Broken-line method of selective signaling

C

Capacity reactance
Carbon
adaptability
limitations
preparation of
superiority
Carbon air-gap arrester
Carbon-block arrester
Carrying capacity of transmitter
Central-office protectors
Characteristics of sound
loudness
pitch
timbre
Chloride of silver cell
Closed-circuit cells
Closed-circuit impedance coil
Common-battery telephone sets
Condensers
capacity
charge
conventional symbols
definition of
dielectric
dielectric materials
functions
means for assorting current
sizes
theory
Conductivity of conductors
Conductors, conductivity of
Conventional symbols
Cook
air-gap arrester
arrester
arrester for magneto stations
Crowfoot cell
Current supply to transmitters
common battery
advantages
bell substation arrangement
bridging battery with impedance coils
bridging battery with repeating coil
current supply from distant point
current supply over limbs of line in parallel
Dean substation arrangement
double battery with impedance coil
Kellogg substation arrangement
North Electric Company system
series battery
series substation arrangement
Stromberg-Carlson system
supply many lines from common source
repeating coil
retardation coil
local battery

D

Dean
drop and jack
receiver
wall telephone hook
Desk stand hooks
Kellogg
Western Electric
Dielectric
Dielectric materials
dry paper
mica
Differential electromagnet
Direct-current receiver
Drainage coils

E

Electric lamp signal
Electrical hazards
Electrical reproduction of speech
carbon
conversion from sound waves to vibration of diaphragm
conversion from vibration to voice currents
conversion from voice currents to vibration
cycle of conversion
detrimental effects of capacity
early conceptions
electrostatic telephone
induction coil
limitations of magneto transmitter
loose contact principle
magneto telephone
measurements of telephone currents
variation of electrical pressure
variation of resistance
Electrical signals
audible
magneto-bell
telegraph s