Note 3 — Chapter II

In appearance these gigantic pots and cauldrons are similar to the large basin-shaped, or funnel-like holes made ages ago by the glacier on the sandstone ridge in the “Glacier garden of Lucerne,” Switzerland. But there, lying at the bottom of the basins are the colossal balls, which once as hard blocks of stone had slipped through the icy fissures, and had then been rolled and twisted about by the action of water rushing down upon them until the deep holes were made. The Bermudian boilers appear rather to have been built up than hollowed out.