The tube has a lateral glass tube fused into it, by which the exhaustion is made, which is afterwards sealed off, and this tube projects on the side of the wider portion of the gap between the silver plugs.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
A variation of the above arangements consists in making this lateral circuit equal in length to one-half of a wave, and connecting the coherer to its centre through a condenser to the earth.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
One of these lateral wires is made equal, or nearly equal, in length to the aerial, and the other is made longer to fulfil the following condition.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming