[To] explain the phenomena of the mineral kingdom ... systems are usually reduced to two classes, according as they refer to the… — John Playfair Copy Share Image
The Author of nature has not given laws to the universe, which, like the institutions of men, carry in themselves the elements of their… — John Playfair Copy Share Image
“The ridge of the Lammer-muir hills... consists of primary micaceous schistus, and extends from St Abb's head westward... The sea-coast affords a transverse section… — John Playfair Copy Share Image
[To] explain the phenomena of the mineral kingdom ... systems are usually reduced to two classes, according as they refer to the origin of… — John Playfair Copy Share Image
Every river appears to consist of a main trunk, fed from a variety of branches, each running in a valley proportional to its size,… — John Playfair Copy Share Image
Thus we conclude, that the strata both primary and secondary, both those of ancient and those of more recent origin, have had their materials… — John Playfair Copy Share Image
To trace the series of these revolutions, to explain their causes, and thus to connect together all the indications of change that are found… — John Playfair Copy Share Image
Amid all the revolutions of the globe, the economy of Nature has been uniform, ... and her laws are the only things that have… — John Playfair Copy Share Image
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