i issa be different minerals ; namely, felspar, delspar and quartz are both white, and ****** of the rock. The garnet is scattered NI # surall red grains and crystals. From this We want this phat our notions respecting this rock in this iesa deve seu acherto incorrect. I have never seen any rock kan Great Britain, except in cabinets; and in no one ve ai i nie learn whence the specimen had come. We see Wishie wapanch's analysis, given in a preceding number of the soblana's is vi no real utility, as the constituents so found must เช่น for the accidental proportions of the three minerals conMasalasiingia w bitestone. X. Height of the Peak of Teneriffe. O¥ all the measurements of this mountain, there seem to be owly three upon which we can rely. Borda measured it trigonokirically in 1776; Lemanon barometrically in 1785; and Cordier duwwetrically in 1803. Their results are as follows :Borda.. 1905 French toises. Lamanon 1902 Cordier 1920 Mean 1909 Forces in the North Atlantic in 1799. . W. Longi Number of N. Latitude from Magnetical oscillations Remarks. tude. Greenwich. Dip. in ten min. 38° 52' 180 42 68.180 242 Good observation. 37 26 18 52 67.81 242 Almost perfect calm. 34 30 19 15 65.70 234 Perfect calm. 31 46 19 24 64.71 237 Doubtful, especially the intensity. 28 28 20 53 62:41 238 Good. 24 53 23 18 60.84 239 Very good. 21 29 28 2 58.18 237 Good. 19 31 5 .57.27 236 Good. 14 15 50 23 50.67 239 Good. 13 2 55 35 45.60 234 Dip good, intensity doubtful. 1 57 ll 42:34 237 Good. 10 46 63 14 42.25 229 Good. Hifiman, Tinetala on the W XII. Postman of the Province of Jaen de Bracamoros. In order to render the communication between the coasts of the Pacific Ocean, and the province of Jaen de Bracamoros, situated on the east of the Andes, more easy, the postman of Perušeni , ar rogett One mus con Order descends swimming for two days, first the river Guancabamba, or spar , Chamaya, and afterwards that of Amazons, from Pomahuaca and Ingatambo to Tomependa. He wraps the few letters of which he is the bearer every month, sometimes in a handkerchief, sometimes in a kind of drawers called guayuco, which he winds as a turban a round his head. This turban contains also the great knife with which every Indian is armed, rather to cut his way through the forests, than as a weapon of defence. The Chamaya river is not navigable, on account of a great number of small cascades. Its fall, according to Humboldt, from the ford of Pucara to its mouth in the river of the Amazons, below the village of Choras, a distance of only 18 leagues, is 1778 English feet. The postman in order to fatigue himself less in descending the river, supports himself on a log of bombax or ochroma, trees of very light wood. When a ledge of rocks intersects the bed of the river, he lands above the cascade, crosses the forest, and re-enters the water when he sees no further danger. He has no need of taking provisions with him, for he finds a welcome in a great number of huts, surrounded with plantain trees, and situated along the banks of the river, between las Huertas de Pucara, Cavico, Sonanga, and Tomependa. These rivers are not infested with crocodiles; the savage hordes therefore almost all travel like the Peruvian postman.-Humboldt's Researches, p. 254. XIII. Floetz Trap Rocks. It appears from the observations of Professor Jameson that there exist three floetz trap formations: 1. That in old red sandstone. 2. That in the independent coal. 3. The newest floetz trap, which is considered as newer than the other two. It constitutes the floetz trap formation described by Werner. The floetz trap mountains of Scotland belong chiefly to the two first formations. XIV. Granite in Scotland. Two granite mountains have been lately discovered in Roxburghshire, immediately on the borders of England. They appear to be situated in the midst of the transition rocks of that country. XV. Hoffman. Hoffman, well known as the author of the best German work on mineralogy, is just dead. Unfortunately he has left his work unfinished. XVI. Steffens. Dr. Steffens, one of the most eloquent teachers of natural lá history on the Continent, is a professor at Breslaw, the capital of Silesia. When Silesia was invaded by the French armies, he called together his class, pointed out to them in glowing colours the disgrace of quietly witnessing the pollution of their country by all enemy, and the honour to be obtained by joining in the glorious Eful . 5. oft sicure fo struggle for liberty. His eloquence was successful. The whole class joined the army of Blucher; and Steffens, as adjutant, with his pupils, shared the glory of the campaign of 1813. He has returned with his pupils to Breslaw, has re-opened his class, and is preparing the continuation of his excellent Manual of Oryctognosy. XVII. Transition Limestone. It appears from the late observations of Mohs, that the great ranges of limestone in Carinthia, Stiria, &c. considered formerly as belonging to the first floetz or Alpine limestone, are in fact transition rocks. This is an important fact. XVIII, Porphyry. Porphyry is now described by the German geognosts as occurring not only in the primitive, but likewise in the transition and floetz 'formations, XIX. Interior of New Holland. In the month of December, 1813, Governor Mc. Quarrie sent Mr. Evans to explore the interior of New Holland, by crossing the blue mountains, and travelling in a westerly direction. He took his departure from Emu island, which lies nearly west from Port Jackson, in the Nepean river. The Nepean river runs into the Hawkesbury river, and the colony has extended nearly to its banks. Mr. Evans was absent about three months. He crossed the blue mountains, and travelled nearly due west rather more than 100 miles, through a flat and fertile country. He came to a river running west, to which he gave the name of Mc. Quarrie river. Want of room prevents us at present from entering further into detail. But we shall take an opportunity of resuming the subject in a future number, a M Dec. EDWARD CHARLES HOWARD, Nottingham-place, Middlesex ; for certain means of separating insoluble substances from fluids in which the same are suspended. Aug. 4, 1814. Tobias Michel, Upper Thames-street, London; for a machine for raising water with less power than has hitherto been experienced for the impelling of machinery and other purposes. Aug. 4, 1814. MICHAEL LARKIN, Blackwall, Middlesex; for improvements in windlasses for ships and other vessels. Aug. 16, 1814. HENRY WILLIAM VANDERKLEFT, No. 253, High Holborn, London; for constructing a walk staff to contain a pistol, powder, ball, and telescope, pen, ink, paper, pencil, knife, and drawing utensils. Aug. 17, 1814. uring flera 32 •18 8 ng the Ok koos esbur 44.0 •18 •17 Ilth Mo. 5 N E 29.80 29.7129-755 42 32 37.0 31 39:0, 45 49.5 29.0 22N W 29.67 29.65 29.660 36 19 27.5 23N W 29.81 29.67 29.740 35 26 30.5 24 Var. 29.8129 48 29•645 46 40.5 25 S 29.48 29.1829:330 50 42 46.0 26 W 29:59 29.18 29.385 50 32 4100 27 Var. 29.68 29 30 29 490 44 35 39.5 28 SW 29•64 29:44 29.540 45 36 40•5 30 N 29-45 29-12/29.285 44 32 38.0 30 36.5 33.0 3 E 29.86 29.50 29.680 38 35 The observations in each line of the table apply to a period of twenty-four hours , beginning at 9 A. M. on the day indicated in the first column. A dash depotes, that the result is included in the next following observation. –. .) , REMARKS, Eleventh Month. 4. Misty morning cloudy: shower at night. 5. Overcast, a, m, : wet afternoon and evening. 6. The drops of dew were frozen, but so clear as not to appear like hoar frost s a fine day, with large Cirri, and afterwards Cirrostratus and Cumulus : a streaked sky at sun-set. 7. Hoar frost, followed by cloudy sky: some rain Clear morning: hoar frost: after about four p. m. the sky became very dark, and there was a storm of rain, attended by a single loud explosion of electricity. It is remarkable that on the same day of the month last year, at the same hour and in the same direction, (south-west,) we had a similar storm. 9. Cirrus, with the compound modifications : several shooting stars this evening : windy afterwards. 10. A steady breeze from the N.W.: Cirrostratus appeared over the Thames at sun-rise : ice a quarter of an inch thick, and permanent; ay ba brilliant twilight; first lemon colour, surmounted by purple; then, by the blending of the two, a rich deep orange. 11. Hoar frost. I observe this often continues an an hour 1 longer on some tufts of saxifraga cespitosa than any where else in my garden : the plant grows on close spongy masses of fibre, which are bad conductors of heat, 12. It was stormy last night; and is said to have thundered and lightened about three a, m. Wet this morning; but the day fine: twilight orange, delicately varied with dusky horizontal striæ. 13. Cloudy and raining at eight a. me, but fine afterwards, with a smart breeze. 14. Cloudy. 15. Cirrostratus, a.m. : then Cirrus nimbiformis, depending and curling beneath: a a' turbid sky ensued, and wind in the night. 16. A wet storiny morning. 17. Much wind by night. 18. Small rain, wet and stormy at night. 20.-Hoar-frost: a little rain, at intervals. 21. Overcast. 22, 23, Hoar frost ; misty. 24. The same: near sun-set a hollow wind from S. W., and rain in the night. 25. Wet day. 26. Some rain, a. m. 27. Clear morning, with evaporation : but before noon chond iness was.com coming on from the W., and it rained steadily from sun-set till late at night. 28. Wet again in the night, 30. Large elevated Cirri, with b Çirrostratussa Twelfthi Month.-, Brisk wind at N.: in the night a slighe sprinkling of snow. 3. Wet morning. a RESULTS. T" Ya tento , Prevailing Winds, Westerty.brolte w doen!'? Karen 3130-28 inches; 12.00.6.29.12 inches ; 129.635 inebes. 9....6295499 ****** 0.39-05 ....6 * * In the period last reported, the amounts of evaporation were put, by an oversight, in the column headed “ Rain," and vice versa; which the reader is requested to correct. |