3. Instructio Peregrinatoris, Dissertatio. Præside C. Linnæo. 1759, 4to.

4. Mémoire Instructif sur la Manière de rassembler, de préparer, de conserver, et d'envoyer les diverses Curiosités d'Histoire Naturelle. Par Turgot. 1758. 8vo.--This work is also appended to "Avis pour le Transport par Mer des Arbres, des Plantes vivaces, des Semences, et de diverses autres Curiosités d'Histoire Naturelle. Par L.H. Duhamel." Published at Paris, 1753. 12mo.

5. Directions in what Manner Specimens of all Kinds may be collected, preserved, &c. By J.R. Forster. London, 1771.--This tract, worthy of its well-informed and able author, was published along with his Catalogue of North American Animals.

6. The Naturalist's and Traveller's Companion. By J.C. Lettsom, M.D. London, 1799 8vo.

7. Analysis of the Natural Classification of Mammalia, for the Use of Travellers.

Introduction to the Ornithology of Cuvier, for the Use of Travellers.

Introduction to Conchology, for the Use of Travellers. By T.E. Bowdich. Paris, 1821-2. 8vo.

8. Instructions for Travellers. By Dean Tucker. 1757. 4to.

9. Essay to direct and extend the Enquiries of patriotic Travellers. By Count Berchtold.--The second volume contains a Catalogue of Travels in Europe; the first alone relates to the subject of the title. 2 vols. 8vo. 1789.

10. Essay on the Study of Statistics; intended to assist the Enquiries of inexperienced Travellers. By D. Boileau. 12mo. 1807.