Landline telegraphs used a key to make or break an electrical circuit, a battery to produce power, a single line joining one telegraph station to another and an electromagnetic receiver or sounder that upon being turned on and 
(Landline telegraphs; used; a key; to make or break an electrical circuit, a battery to produce power, a single line joining one telegraph station to another and an electromagnetic receiver or sounder that upon being turned on) Context(Landline telegraphs used,List([0, 24))):(Landline telegraphs; used a key to break; an electrical circuit) (a single line joining one telegraph station to another and an electromagnetic receiver or sounder; upon being turned on; ) (a battery; to produce; power) (a single line; joining; one telegraph station; to another)
Landline telegraphs used,List([0, 24))
Landline telegraphs Landline telegraphs a single line joining one telegraph station to another and an electromagnetic receiver or sounder a battery a single line
used used a key to break upon being turned on to produce joining
a key to make or break an electrical circuit, a battery to produce power, a single line joining one telegraph station to another and an electromagnetic receiver or sounder that upon being turned on
an electrical circuit
power
one telegraph station to another