and the yellow; and from this point the heat of the rays diminishes much more on the side of the violet than on that of the deep red. Dr. READE has made several experiments to prove that the prism has a calorific focus. When the orange rays were thrown on the bulb of the Thermometer, the mercury rose in five minutes from 50° to 58°. When the bulb of the thermometer was exposed in the same manner to the action of the green rays, the mercury rose from 50° to 54°. Under the same circumstances the violet rays caused the same thermometer to rise from 50° to 51°. These results, therefore, agree with those of l'ABBE ROCHON, as stated above. Dr. R. also received the spectrum on a sheet of white paper; and when this was within an inch of the prism, the spectrum was about one fourth of an inch in breadth, bounded on one side by orange and yellow rays, and on the other by blue and violet, while light occupied the middle. The thermometer stood at 70° in the adjacent sunshine, but when it was placed in the rays of the spectrum, it rose in ten minutes to 81°. It also rose and fell alternately when moved in and out of the spectrum. In another experiment, Dr. R. placed a "highly sensible and correct thermometer on a sheet of white paper, resting horizontally on a writing table. In five minutes it rose in the full sun-beams to 8210; and after remaining for some time stationary, he held a large prism at about one inch distance immediately over it, and in such a manner as to convey the rays of light as much as possible to the prismatic focus, and also to immerse the entire thermometric bulb and cylinder, in a spectrum of transmitted light. In five minutes the thermometer rose to 101°; or, in other words, the transmitted light was heated 18 above the full sunshine, by passing through the prism. On removing the prism, the thermometer fell in five minutes to 85°; and on again immersing it in the spectric light, it rose to 101°." 10 The Red Sand Stone Formation has been met with in the most distant parts of the globe, and frequently occupies large tracts of country. It contains many different kinds of rocks, either in beds, mountain-masses, or veins. PROFESSOR JAMESON has found the following kinds in the red sand-stone of Scotland: viz. red-colored slateclay; clay-stone; clay-ironstone; trap-tuff; Amygdaloid; Basalt; clink-stone; green-stone; pitch-stone; felspar; porphyry; lime-stone, and lime-stone conglomerate; and coal. The remarkable mass of Native Iron, which was discovered at Aachen, in 1762, by Counsellor Löber, when he was with Maximilian, Prince of Saxony, as physician at the baths of that town, has been lately rediscovered. Löber first discovered this mass in the pavement, ob tained leave to dig it up, and took some specimens of it. An account was published at p. 36 of a weekly paper, at Wittenberg, in 1773; and again in the Memoirs of the Berlin Society of Natural History, vol. vii. page 323. But in both these places Aken was substituted for Aachen; by which means the mass could not be found at the place mentioned; and consequently was considered as lost. The Academy of Berlin obtained an order from the Chancellor, Prince Hardenberg, to search for the mass at Aachen, where it was found. It is of an irregular shape approaching to oval. Its length is stated at four feet nine inches; breadth two feet eleven inches; and thickness two feet six inches. Its specific gravity, as ascertained from a fragment that was struck off, is 67; and the weight of the whole is about 15,000lbs. 1 It is covered with a coating of ochre about half a line in thickness, under which is another crust about half an inch thick, which may easily be separated from the iron itself. This covering is greenish, vesicular, and exhibits the marks of fire. The native iron which lies under this covering is extremely tough. Mr. Monheim has ascertained that it does not contain any nickel, but is composed of about one-fifth arsenic, and four-fifths iron. There may also be a third metal, but the quantity of this is so small that its nature has not yet been determined. A paper, by Mr. DONOVAN, was lately read to the Royal Society, giving an account of his discovery of a new vegetable acid in the juice of the berries of the sorbus aucuparia, which he calls Sorbic acid. The following are its properties. It is colorless, its taste is intensely sour, and it reddens vegetable blues. It does not crystallize, nor easily undergo spontaneous decomposition. It combines with oxide of lead in three different proportions; and by these combinations, forms 1. Subsorbate of lead, which is a hard white insoluble powder. 2. Sorbate, in either powder or crystal, and which is also insoluble. 3. Supersorbate, which does not crystallize. It forms soluble salts with barytes, lime and magnesia, but does not combine with alumina. Mr. Donovan's paper also contains an account of some experiments on the preparation of malic acid. Mr. PORRETT, jun. has corrected the numerical results in his paper which we noticed at page 319 of our No. for July. They should stand as follows. Prussiate of Mercury is composed of Prussic acid. Paroxide of mercury ...... ... 13.8 86.2 acid is a compound of 1 atom of black oxide of iron and 4 atoms of Prussic acid. M. THENARD has formed a composition which he calls an uncbaugeable Cement, which resists the filtration of water, and is so hard that it scratches iron. This composition is extremely simple, and consists only of 93 parts of well burnt brick or clay, and 7 of litharge, reduced to a fine powder, and mixed with as much linseed oil as is sufficient to give it the consistence of thin plaster. The body to be covered with this cement is first to be wetted with a sponge; and then it is to be applied like plaster; and in a few days it becomes hard. Winds Westerly, with Easterly at the beginning and end of the period. Barometer. Greatest height ........ 30 23 inc. Mean for the period 29.812. Mean for the period 58.58 Rain 1.10 inches. Evaporation 2.08 inc. 432 II. WORKS PREPARING FOR PUBLICATION. In the Press, dedicated to his Majesty the King of Prussia, and speedily will be published, in one vol. 8vo. the Life and Campaigns of Field Marshal Prince Blucher; interspersed with much novel and interesting matter, and enriched with authentic Anecdotes and biographical Incidents of all the leading Characters of both the Confederate and French Armies. Drawn from original and official Sources; embellished with a fine Portrait, and engraved Plans of the most signal Battles. Translated from the German of General Gueisenau, Quarter-master-general to Prince Blucher's Army, with considerable Additions, by J. E. Marston, Esq. of the Hamburg-bürger-guard. Dr. Halliday, of Birmingham, is preparing for the press, Observations on a Tour through certain Provinces of Eastern Russia. And he will soon publish Translations of Professor Frank's Illustration of the Doctrine of Excitability; and of Professor Roeschlaub's Exposition of the Causes of Diseases. Mr. J. Man has in the press, the Ancient and Modern History of Reading, illustrated by upwards of twenty maps and prints. A Tour in Istria, Carniola, &c. in the spring of 1814, by an English Merchant, will soon appear. An Officer of the Medical Staff, who served in the late Campaigns in Spain and Flanders, will soon publish a Poem, of which the hattles of Waterloo, Orthes, and Toulouse, will form the principal part. The Author of the Rejected Odes, and other Pieces, has in the press, Waterloo, an heroic Poem, comme.norative of that most glorious victory. E. V. Utterson, Esq. has in the press, in two small octavo volumes, Select Pieces of Early Popular Poetry, all prior to the 17th century. The History of England, from the Norman Conquest to the Accession of Edward the First. By Sharon Turner, F.S.A. Volume the Second, 4to. The Life of James the Second, King of England, collected out of Memoirs written by himself; also, King James's Advice to his Son; and that Monarch's last Will, dated November 17, 1688. The whole to be edited, by order of his Royal Highness the Prince Regent. By the Rev. J. S. Clarke, LL.B. F.R.S. Historiographer to the King, Chaplain of the Household, and Librarian to his Royal Highness. Shortly will be published, the Legend Confuted, or Truth Undisguised. The Military Costume of Europe, No. XVI. which has been delayed by the ill health of the Editor, will now soon be ready for publication; among the other Figures will be that of the Marquis of Anglesey in his Military Uniform as Colonel of the 7th. The Rev. W. M. Stirling is preparing an historical and statistical work of the Priory of Inchmahome, in Perthshire, to be illustrated by engravings. Edinburgh Fugitive Pieces, with Letters containing a comparative view of the mode of living, arts, commerce, literature, manners, &c. of Edinburgh, at different periods, by the late Mr. Wm. Creech, will soon appear. , The Rev. W. L. Bowles has in the press, an Essay on the Original Sources of Error, which have led to the perversion of the pure word and plain sense of the Bible, from the Christian era to the pre sent. Mr. Richardson will soon publish, in a quarto volume, Illustrations of English Philology, in a critical Examination of Dr. Johnson's Dictionary. History of the Pestilential Dis order that broke out in the province of Andalusia, in the year 1800, with a detailed Account of the fatal Epidemics at Gibraltar, during the Autumnal Months of 1804, and at Cadiz in 1810 and 1813, To which are added, Observations on the Remitting and Intermitting Fever, as it appeared in the Military Hospitals at Colchester, after the return of the Troops from the Expedition to Zealand, in 1809. Dedicated by permission to the Commander in Chief. By Sir James Fellowes, M.D. F.R.S. &c. Fellow of the Royal College of Physicians, London, and of Caius and Gonville College, Cambridge, Physician to the Forces, and Inspector of Military Hospitals. Speedily will be published, Rhoda; a Novel, in three volumes. By the Author of Things by their Right Names, Plain Sense, &c. The History of the most ancient and honorable Military Order of the Bath, from its first institution to the present time, with a Dissertation on Ancient Chivalry, is printing in two quarto volumes, illustrated by many engravings. The Rev. S. Lyon is printing Hebrew and English Grammar and Lexicon, in four volumes. The British Review, Number XI. will be published on the 1st of August. A second edition of Mr. Bigland's History of Europe continued to the General Peace in 1814, is nearly ready for publication. Dr. Powell will soon publish a new edition, revised and corrected, of his translation of the London Pharmacopoeia, with Notes, &c. Baxteriana, a Selection from the Works of Baxter, by Arthur Young, Esq. is printing in a duodecimo volume. The Annual Register for the Year 1806, in a very large volume. III. WORKS RECENTLY PUBLISHED. chism. With twenty-three copper plate engravings, 5 vols. 18mo. 21. 2s. boards. DOMESTIC ECONOMY. A Treatise on the Economy of Fuel, and Management of Heat, especially as it relates to Heating and Drying by Means of Steam: In Four Parts. I. On the Effects of Heat, the Means of Measuring it, the comparative Quantity of Heat produced by different Kinds of Fuel, Gas Light, &c. II. On Heating Mills, Dwelling-houses. Baths, and Public Buildings. III. On Drying and Heating by Steam, IV. Miscellaneous Observations. With many useful Tables. Also an Appendix, containing Observations on Chimney Fireplaces, par |