Johann Jakob Scheuchzer

In the former category is his self-published Beschreibung der Naturgeschichte des Schweitzerlandes (3 vols., Zürich, 1706–1708), the third volume containing an account in German of his journey of 1705; a new edition of this book and, with important omissions, of his 1723 work, was issued, in 2 vols, in 1746, by JG Sulzer, under the title of Naturgeschichte des Schweitzerlandes sammt seinen Reisen über die schweitzerischen Gebirge, and his Helvetiae historia naturalis oder Naturhistorie des Schweitzerlandes (published in 3 vols, at Zürich, 1716–1718, and reissued in the same form in 1752, under the German title just given). The first of the three parts of the last-named work deals with the Swiss mountains (summing up all that was then known about them, and serving as a link between Simmler's work of 1574 and Gruner's of 1760), the second with the Swiss rivers, lakes and mineral baths, and the third with Swiss meteorology and geology.

Scheuchzer's works, as issued in 1746 and in 1752, formed (with Tschudi's Chronicum Helveticum) one of the chief sources for Schiller's drama Wilhelm Tell (1804). In 1704, Scheuchzer was elected FRS. He published many scientific notes and papers in the Philosophical Transactions for 1706–07, 1709 and 1727–28.

Scheuchzer's frontispiece to "Museum Diluvianum", dedicated to Hans Sloane, 1716

In the second category are his Itinera alpina tria[1] (made in 1702–04), which was published in London in 1708, and dedicated to the Royal Society, while the plates illustrating it were executed at the expense of various fellows of the society, including the president, Sir Isaac Newton (whose imprimatur appears on the title-page), Sir Hans Sloane, Dean Aldrich, Humfrey Wanley, etc. The text is written in Latin, as is that of the definitive work describing his travels (with which is incorporated the 1708 volume) that appeared in 1723 at Leiden, in four quarto volumes, under the title of Itinera per Helvetiae alpinas regiones facta annis 1702–11.

These journeys led Scheuchzer to almost every part of Switzerland, particularly its central and eastern districts. Apropos of his visit (1705) to the Rhône Glacier, he inserts a full account of the other Swiss glaciers, as far as they were then known, while in 1706, after mentioning certain wonders to be seen in the museum at Lucerne, he adds reports by men of good faith who had seen dragons in Switzerland. He doubts their existence, but illustrates the reports by fanciful representations of dragons, which have led some modern writers to depreciate his merits as a traveller and naturalist, for the belief in dragons was then widely spread.

In 1712 he published a map of Switzerland in four sheets (scale 1/290,000), of which the east portion (based on his personal observations) is far the most accurate, though the map as a whole was the best map of Switzerland till the end of the 18th century. At the end of his 1723 book he gives a full list (covering 27 quarto pages) of his writings from 1694 to 1721.

Scheuchzer is also known for his paleontological work. In his Lithographia Helvetica, he described fossils as "plays of nature" or alternately as leftovers from the biblical Flood. Most famously, he claimed that a fossilized skeleton found in a Baden quarry was the remains of a human who had perished in the deluge. This claim, which seemed to verify the claims of Christian scripture, was accepted for several decades after Scheuchzer's death, until 1811, when French naturalist Georges Cuvier re-examined the specimen and showed that it was actually a large prehistoric salamander.