Of those travellers then the first to be here especially named is Marsigli, the fifth volume of whose Danubius Pannonico-Mysicus is devoted to the birds he met with in the valley of the Danube, and appeared at the Hague in 1725, followed by a French translation in 1744.8 Most of the many pupils whom Linnaeus sent to foreign countries submitted their discoveries to him, but Kalm, Hasselqvist and Osbeck published separately their respective travels in North America, the Levant and China.
A Russian traveller, Peter Kalm, in his work on America, published in 1748, showed on a map the oil springs of Pennsylvania, and about the same time Raicevich referred to the " liquid bitumen " of Rumania.
The Kickelhahn (2825 ft.) and the Hohe Tanne (2641 ft.) rise in Ilmenau; but the Grosser Kalm (1814 ft.) near Remda, in the extreme south, is the highest point in the main part of Weimar.