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Narrative of a Voyage of Discovery in the Interior of Africa, from the Western Coast to the River Niger in 1818, 1819, 1820, and 1821. By Brevet Major Gray. 8vo.

Journal of a Tour in Asia Minor. By W. Martin Leake, FRS. 8vo. Lisbon in the Years 1821, 1822, and 1823. By Marianne Baillie. 2 vols. small 8vo.

JUST PUBLISHED.

Bostock's Elementary System of Physiology. 8vo. 158.

The Zoological Journal, No. I. 10s. (To be continued Quarterly.) The History of Ancient and Modern Wines. With Embellishments from the Antique. 4to. 21. 2s. With the Vignettes on India paper, 31. 38.

Selection from De Humboldt, relating to the Climate, Productions, Mines, &c. of Mexico. By John Taylor, Treas. Geol. Soc. 8vo. 12s, Travels in Brazil, in the Years 1817, 1818, 1819, and 1820, undertaken by the Command of the King of Bavaria. By Drs. J. Von Spix; and C. Von Martins. Vols. I. and II. 8vo. 11. 4s.

Critical Researches in Philology and Geography. 8vo. 8s.

The Perennial Calendar and Companion to the Almanac, as con nected with History, Botany, Natural History, Astronomy, &c. &c, By Thomas Forster, FLS. &c. 8vo. 18s.

Naval Battles from 1744 to 1814, critically reviewed and illustrated, C. Ekins, Rear-Adm, CB. &c. 4to. with 79 Plates and numerous Diagrams. 31. 3s.

By

J. Arrowsmith, Esq. Air-street, Piccadilly, for an improved mode of publicly exhibiting pictures or painted scenery of every description, and of distributing or directing the day-light upon or through them so as to produce many beautiful effects of light and shade, which he denominates Diorama.-Feb. 10.1

R. Lloyd, Strand, hatter, and J. Rowbotham, of Great Surrey-street, Blackfriar's-road, Surrey, hat-manufacturer, for their having invented and brought to perfection a hat upon a new construction which will be of great public utility.-Feb. 19.

H. Adcock, Suminer Hill Terrace, Birmingham, gilt toy manufac< turer, for his improvement in making waistbands.-Feb. 19.

W. Church, Esq. Birmingham, Warwickshire, for certain improve ments in machinery for printing.-Feb. 19.

A. Applegath, Duke-street, Stamford-street, Blackfriars, Surrey, printer, for certain improvements in machines for printing.-Feb. 19. Rev. M. Isaacs, Hounsditch, for certain improvements in the con struction of machinery, which, when kept in motion by any suitable power or weight, is applicable to obviate concussion by means of preventing counteraction, and by which the friction is converted into an useful power for propelling carriages on land, vessels on water, and giving motion to other machinery.-Feb. 19.

J. Vallance, Esq. Brighton, for his method of communicating goods or intelligence from one place to another with greater expedition than by means of steam-carriages, or other vessels.-Feb. 19.

A. H. Chambers, Esq. New Bond-street, Middlesex, for his invented improvements in preparing and paving horse and carriage ways.Feb. 28.

R. Evans, Bread-street, Cheapside, wholesale coffee-dealer, for his process of roasting coffee and other vegetable substances, with improvements in the machinery employed.-Feb. 28.

J. Gunby, New Kent-road, Surry, sword and gun manufacturer, for a process by which a certain material is prepared, and rendered a suitable substitute for leather.-Feb. 28.

J. Christie, Mark-lane, merchant, and T. Harper, Tamworth, Stafford, merchant, for their improved method of combining and applying certain kinds of fuel.-Feb. 28.

W. Yetts, Great Yarmouth, merchant and ship-owner, for his invented certain apparatus to be applied to a windlass.-Feb. 28.

J. W. Richards, Caroline-street, Birmingham, metallic hot-house maker, for his improved metallic frame and lap, applicable to all hothouses, green-houses, horticultural frames and glasses, sky lights, and other inclined lights and glasses.-Feb. 28.

W. Greaves, Sheffield, merchant, for certain improvements to harness, principally applicable to carriages drawn by one horse.-Feb. 28. W. James, Westminster, land agent and engineer, for certain improvements in the construction of rail and tram roads or ways.Feb. 28.

M. de Jough, Warrington, in the County Palatine of Lancaster, cotton-spinner, for his mode of constructing and placing a coke oven under or contiguous to steam or other boilers, so as to make the heat arising from making coal or other intense combustion in the said oven subservient to the use of the boiler, instead of fuel.-Feb. 28.

C. Bagenell Fleetwood, Gent. Parliament-street, Dublin, for his invented liquice and composition for making leather and other articles waterproof.-Feb. 28.

J. Spiller, Chelsea, Middlesex, engineer, for improvements in the machinery to be employed in the working of pumps.-March 6.

J. Heathcoat, Tiverton, Devon, lace manufacturer, for a new method of manufacturing certain parts of machines used in the manufacture of lace commonly called bobbin net.-March 9.

J. Heathcoat, Tiverton, Devon, lace-manufacturer, for his improved economical method of combining machinery used in the manufacture of lace in weaving and in spinning worked by power.-March 9.

W. D. Mosley, Radford, Nottingham, lace-manufacturer, for improvements in the making and working of machines used in the manufacture of lace commonly called bobbin net.-March 10.

W. Morley, Nottingham, lace-manufacturer, for various improvements in machinery now in use for the making lace or net commonly known by the name of bobbin net.-March 15,

R. Kirk, Osborne-place, Whitechapel, dyer, for his new method of manufacturing a certain vegetable substance, growing beyond the seas, as a dye or red colouring matter for the use of dyers called safflower, so as more effectually to preserve its colouring principle. March 20

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 denotes that the result is included in the next following observation.

REMARKS.

+

Third Month.—1. Fine morning: afternoon cloudy: evening rainy. 2. Fine, 3. Stormy, with snow, sleet, and rain, at intervals; and some hail. 4. Fine. 5. Showers. 6. Cloudy. 7. Rainy. 8. Morning rainy, with boisterous wind: cloudy. 9. Fine. 10. Cloudy and showery. 11. Rainy. 12. Stormy: showers of hail, rain, and sleet, during the afternoon. 13. Hail showers: sleet: driving wind. 14. Cloudy: windy. 15. Cloudy. 16-20. Fine. 21. Rainy. 22. Rain and sleet. 23. A considerable fall of snow this morning, in very large flakes: the day was afterwards fine. 24. Overcast: bleak. 25. Fine: cold. 26. Fair: bleak. 27. Showers. 28. Showers of snow and hail, with occasional gleams of sunshine. 29. Fine. 30. Fine: bleak: snow and hail showers. 31. Fine: bleak: a little snow.

RESULTS.

Winds: N, 5; E, 1; S, 1; SW, 5; W,4; NW, 9; NE, 5; Var. 1.

Remarks on Solar Light and Heat. By Baden Powell, MA. of Ŏriel College, Oxford.

(Continued from p. 328.)

(18.) IN attempting an inquiry into the constitution of the solar rays in reference to their heating power, I made the simple experiment described in my former communication, under an impression that every step in such an inquiry ought to be taken with the utmost caution; and that no position however probable. ought to be assumed till sufficiently examined by experiment. Those experiments appear to me to prove that in the solar rays no free uncombined radiant heat exists, at least in any quantity sufficient to produce a rise of a quarter of a centigrade degree, on a thermometer coated with a wash of chalk. The same point, however, may be put to a more accurate and delicate test by means of Leslie's differential thermometer-an effect corresponding to the twentieth part of a centigrade degree may be thus rendered sensible.-(See Leslie on Heat, p. 11 and 420, and Treatise on Instruments, p. 10.).

Being particularly desirous of ascertaining whether it were possible to detect the smallest appreciable degree of simple radiant heat in the natural state of the solar rays, I continued the examination of the point by the following application of the differential thermometer. The instrument employed was of the "stationary" kind, the sentient ball was blown of black glass, and the halves of degrees could be very readily observed on its scale...