Note 81 — PETER KALM’s TRAVELS. (continued 3)

Giants-pots81, which I have described in the memoirs of the Royal Swedish Academy of Sciences, are abundant near the fall of the rock which extends across the river. The rock was almost dry at present, the river containing very little water at this season of the year. Some of the giants-pots were round, but in general they were oblong. At the bottom of most of them lay either stones or grit, in abundance. Some were fifteen inches in diameter, but some were less. Their depth was likewise different, and some that I observed were above two foot deep. It is plain that they owed their origin to the whirling of the water round a pebble, which by that means was put in motion, together with the sand.