Note 13 — Incrustation.

Mr Stevenson, in his observations upon the bed of the German Ocean and British Channel, maintains that the level of the sea is continually rising, and has been very sensibly elevated within the last three centuries. Fortis asserts the same of some parts of the Adriatic sea. But the example of the Temple of Serapis, near Pouzzola, proves that the margins of that sea are, in many places, of such a nature as to be subject to local risings and fallings. On the other hand, there are thousands of quays, roads, and other works, made along the sea-side by the Romans, from Alexandria to Belgium, the relative level of which has never varied. Note K.