Paper, 'A thermal telephone transmitter' by George Forbes

Description

Forbes writes: 'We have had so much evidence of the sensitiveness of the Bell telephone receiver to the minutest changes of current, that we have ceased to be surprised at any transmitter which responds to the sounds of articulate speech. But, in the instrument now shown, it was so extremely unlikely that sensible variations of current could be produced with sufficient rapidity, that even now there is perhaps some interest attached to the experiment. A wooden cylinder was used closed at one end.'

Annotations in pencil and ink.

Subject: Engineering

Received 12 February 1887. Read 24 February 1887. Communicated by Lord Rayleigh [John William Strutt].

A version of this paper was published in volume 42 of the Proceedings of the Royal Society as 'A thermal telephone transmitter'.

Reference number

PP/10/15

Earliest possible date

1887

Physical description

Ink and graphite pencil on paper

Page extent

3 pages

Format

Manuscript