Contrast with the stillness which reigns during the noon-tide hours on days of more than usual heat in the torrid zone. Description of the narrows of the Orinoco at Baraguan. Humming and fluttering of insects. Life stirs audibly in every bush, in the clefts of the bark of trees, and in the earth undermined and furrowed by Hymenopterous insects 271-272 _Scientific Elucidations and Additions_--p. 273 to p. 275. Characteristic terms in Arabic and Persian descriptive of the surface of the ground (Steppes, grassy plains, deserts, &c.) Richness of the old Castilian idiom in words expressive of the form of mountains. Fresh-water skates and dolphins. In the great rivers of both continents some organic sea-forms are repeated. American nocturnal monkeys, the three-striped Douroucouli of the Cassiquiare. 273-275 _Hypsometric Addenda_--p. 277 to p. 285. Pentland’s measurements in the eastern mountain chain of Bolivia. Height of the volcano of Aconcagua according to Fitzroy and Darwin. Western mountain chain of Bolivia 277-279 Mountain systems of North America. Rocky Mountains and the Snowy Chain (Sierra Nevada) of California. Laguna de Timpanogos 279-283 Hypsometrical profile of the Highland of Mexico from the city of Mexico to Santa Fé 283-285 END OF VOL. I. Wilson and Ogilvy, Printers, 57, Skinner Street, Snowhill, London. Transcriber's Note Duplicate chapter headings have been removed. The following apparent errors have been corrected: p. 47 "parallels of 40° and 55°" changed to "parallels of 40° and 55°." p. 49 "Mount St. Elias (1980 toises" changed to "Mount St. Elias, 1980 toises" p. 49 "43° 2′, long. 112° 28" changed to "43° 2′, long. 112° 28′" p. 50 "Scoriacous" changed to "Scoriaceous" p. 52 "miles The surface of" changed to "miles. The surface of" p. 53 "the tongue a much-prized" changed to "the tongue, a much-prized" p. 60 "greenstone porpyhry" changed to "greenstone porphyry" p. 62 "θρύον καὶφῦκος" changed to "θρύον καὶ φῦκος" p. 62 "shoal dissappeared" changed to "shoal disappeared" p. 65 "E. meditterranea" changed to "E. mediterranea" p. 68 "Bedouin tribes”" changed to "Bedouin tribes" p. 71 "p. 4.)--" changed to "p. 4.--" p. 76 "Appennines. (Compare" changed to "Apennines. (Compare" p. 91 "view of Erastosthenes" changed to "view of Eratosthenes" p. 91 "issue from a avcity" changed to "issue from a cavity" p. 97 "than the Dawalagiri" changed to "than the Dhawalagiri" p. 113 "and “this name" changed to "and this name" p. 116 "oises (3580 Eng. feet)" changed to "toises (3580 Eng. feet)" p. 128 "leaves also A similar" changed to "leaves also. A similar" p. 132 "in lat 44° 53′" changed to "in lat. 44° 53′" p. 137 "repose. “At the present moment" changed to "repose. At the present moment" p. 139 "true “insular climate;" changed to "true “insular climate;”" p. 141 "lat 42° 53′" changed to "lat. 42° 53′" p. 141 "42°.2, and 63°." changed to "42°.2, and 63°.0"