Rensselaer Semi-Weekly Republican, Volume 36, Number 125, Rensselaer, Jasper County, 4 November 1904 — Coming to the Tunnel. [ARTICLE]

Coming to the Tunnel.

It Is a most carious fact, though R may bare escaped general attention, that the approach of a train In a tunnel may be easily ascertained some seconds before it Is visible to those traveling towards, it in an opposite direction. The length of a tunnel is no obstacle to the realization of this curious phenomenon, and compressed air is the medium which produces the peculiar “under-water” sensation. Without any warning the drum of the ear is pneumatically pressed inwards the moment tbe locomotive of the other train enters the tunnel (which, for all practical purposes, Is only a large tube), owing to the now limited air-space. Many persons must have noticed this peculiar feeling In the ears without giving the matter a second thought.