[B96]

Journal of the Roy. Geograph Soc. Vol VI p. 416 Mr Weitz (communication forwarded by Colonel Jackson)

"When the thaw sets in, the ice becoming rotten, lets fall the gravel & stones in place far distant from those, whence they came. Phenomenon observed in river Kann seen sloshing from bottom in rapid rivers – It is seen in the Angara & Wolga.

I may add my explanation of when movement prevails to colder weather rising to the surface &c that when mass cooled [frequently] the presence of points of attachment would [illeg] this ice first to layer to form these.

[B96v]

Vol V Part I p. 12

Colonel Jackson on the Congelation of Neva. whole body of water beneath the ice at zero.

[B97]

[blank]

[97v]

Ireland in his Picturesque views of the river Thames – is corroborated by observation of Dr. Plott who says the watermen frequently pact ice seen or cakes of ice in their rise & sometimes in the under side inclosing stones & gravel brought up by them at "mo" – I shall not stop – "shall closely observe that the flanks of ice which rise from the bottom of the Angara, often bring up in like manner large stones." – p 13

Ireland

D. Plott

Richardson

Enderby

References:

1836. On ground-ice in the Siberian rivers. Communicated by Col. Jackson. Journal of the Royal Geographical Society 6: 416-418.

1835. Congelation of the Neva at St. Petersburgh, and temperature of its waters when covered with ice. Communicated by Colonel Jackson. Journal of the Royal Geographical Society 5: 1-22.