"I put the forked metal to my ears and listened"
by cm

Phonograph recordings could be played back through a horn or through stethoscope-like earphones  – the "forked metal"  – as pictured.

In the drawing, the phonograph is on the left, powered by the treadle below.  The machine on the right is a typewriter, for transcription of the recording.  The drawing is dated 1897, the year of Dracula's publication.