Saussure (Horace-Bénédict de) Agenda du voyageur géologue, taken from the 4th volume of Voyages dans les Alpes. Geneva, Bibliothèque Britannique, J. J. Paschoud, 1796. In-12, half cloth binding with corners, gilt title on spine (19th century boards). Rare first separate edition, published the same year as the corresponding volume of "Voyages", of what is intended to be advice to non-naturalist travellers so that they may usefully contribute to the progress of science by their observations. Printed on blue paper. A fine copy. Perret, 3913-B