“Just as the spectroscope opened up a new astronomy by enabling the astronomer to determine some of the constituents of which distant stars are composed, so the seismograph, recording the unfelt motion of distant earthquakes, enables us to see into the earth and determine its nature with as great a certainty, up to a certain point, as if we could drive a tunnel through it and take samples of the matter passed through.” IfsMatterEarthScienceCertainStarsNatureDetermineAstronomyCertaintyTunnelsEarthquakesEnablingConstituentsSampleAstronomers Author:Richard Dixon Oldham
