31. Materia Medica Regni Lapidei. Upsal, 1752. The three parts of the Materia Medica were published separately, and the two last have been inserted in the Amaenitates Academicae. Two editions were afterwards required by the scientific world. 32. Species Plantarum, exhibens plantas rite cognitas, ad genera relatas cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Holm. apud Salvium. 2 vols 8vo, 1753. Two other editions have since appeared, the last by Trattner in 1764. 33. Museum Tessinianum, Opera Comitis C. G. Tessin, Regis Regnique Senatoris, collectum. Latin and Swedish. Stockholm, 1753. 34. Museum Regis Adolphi Suecorum, &c., in quo Animalia rariora imprimis Exotica, Quadrupedia, Aves, Amphibia, Pisces, Insecta, Vermes describuntur et determinantur. In Latin and Swedish. Stockholm, 1754. Folio, with 35 plates. The preface has been translated into English by Sir J. E. Smith, and published under the title of Linnaeus's Reflections on the Study of Nature. 35. Frederici Hasselquist Iter Palestinum; Ella resa til heliga landet. Holm. 1757. These travels have been translated into German, French, and English. 36. Petri Loeflingii Iter Hispanicum; Ella resa til Spanksa landerna, uti Europa och America, &c. Holm. 1758. 8vo. This work was translated into English by the Forsters. London, 1771. 37. Oratio Regia, coram rege reginaque habita. 1759. Folio. This is to be found also in the Amaenitates Academicae. 38. Disquisitio Quaestionis, ab Acad. Imper. Scientiarum Petropolitanae, in annum 1759 pro Praemio, Propositae: Sexum Plantarum argumentis et experimentis novis, &c. Petropol. 1760. This essay has been inserted in the Trans. of the Petersburg Academy of Sciences, vol. vii. 1761; and in the 22d volume of the Journal Encyclopedique. A translation also published in London in 1786. 8vo. 39. Genera Morborum, Upsal, 1763. Three editions. 40. Museum Reginae Louisae Ulricae, in quo Animalia rariora Exotica, imprimis Insecta et Conchylia describuntur et determinantur; et Musei Regis Adolphi prodromus tomi secundi. Holm. 1764. 41. Clavis Medica Duplex, exterior et interior. Holm. 1763. 42. Mantissa Plantarum, generum editionis sextae et specierum editionis secundae. Holm. 1767. 43. Mantissa Plantarum altera. Holm. 1771. 44. Deliciae Naturae, an oration delivered in 1772. It was translated into Swedish by Linnaeus himself, at the request of the students, and published at Stockholm, 1773. 8vo. The Latin edition has also been printed in the Amaenitates Academicae. * * * * * Besides the above works, of which the Systema Naturae alone would have sufficed to immortalize its author, he published numerous essays on various subjects in the Transactions of the Academies of Sciences of Upsal and Stockholm. In the Transactions of the Upsal Academy:--