The Collaborative International Dictionary
Stathmograph
Stathmograph \Stath"mo*graph\ (st[a^]th"m[-o]*gr[.a]f), n. [Gr.
sta`qmh a measuring line + -graph.]
A contrivance for recording the speed of a railway train.
--Knight.
Wiktionary
stathmograph
n. A device for recording the speed of a railway train.