Icebergs and ice flows. Icebergs encounted by Admiral Murray in the Atlantic; 1794 (top) and the icefields found by Captain Phipps near Spitzbergen in 1773. Engraved by J.B. Hoessel. Handcoloured copperplate engraving from Bertuch's Bilderbuch fur Kinder (Picture Book for Children); Weimar; 1805. Friedrich Johann Bertuch (1747-1822) was a German publisher and man of arts most famous for his 12-volume encyclopedia for children illustrated with 1;200 engraved plates on natural history; science; costume; mythology; etc.; published from 1790-1830.