XIII. A short Account of a new Apple, called the Spring Grove Ат T the request of Mr. T. A. Knight, I beg leave to lay Spring Grove before this Society the opinion formed by my friends and codling. myself last autumn, on the merits of an apple produced by one of his judicious mixtures, which he has done me the honour to call the Spring Grove codling. In the beginning of September, I received a small box of these apples, which were fully ripe; when baked they had all the quickness and flavour of the best winter apples, and a considerable tinge of red. All who had tasted the pie agreed, they had not met with any autumn apple which for baking could be compared to this new one. Mr. Knight informs me, that it is ready Its season of for use in the mouth of July, at a season when London ripening. geese are probably better than at any other; but when the old English accompany ment of apple sauce was not, till Mr. Knight furnished us with this apple, possible to be obtained; in this view it becomes an addition of importance to the old English kitchen, the cookery of which true Englishmen still prefer to French ragouts, or to Spanish olios. It proves of the burr apple kind, and may be accordingly of the bur propagated by cuttings without difficulty, which will bear apple kind: the next year, as well as by grafting. Mr. Hooker, who colours the Pomona Herefordiensis, has made a very excelcellent representation of this fruit, of which a copy accom panies this communication: as a record in the archives of the Society it may hereafter become a useful, as well as a valuable deposit. The tree grows freely, and bears abundantly. Trans. of the Horticultural Society, vol. I, p. 197. SCIENTIFIC SCIENTIFIC NEWS. Properties of DR. Delaroche informs us, that he has made some curi radiant heat. Prize subject. Medica! and chirurgical lectures. ous experiments on radiant heat, which he intended to lay before the Institute. He ascertained, that the heat emitted by radiation is not proportional to the excess of the temperature of the radiating body above the circumambient medium, but that it increases in a much more rapid ratio. Thus, taking the quantity of heat emitted with au excess of 87° to be 1o, the quantity emitted with an excess of 900° will be at least 70°. He also found, that the quantity of unluminous calorific rays that traverse glass is much greater in proportion to the total quantity of rays emitted, when the body that emits them is very hot, than when it is less so; and that the nature of the unluminous calorific rays is not identical, but varies according to the temperature of the source that emits them. At the request of Mr. Berthollet, the French Institute has proposed for the subject of a prize a determination of the specific heat of gasses. St. Thomas's and Guy's Hospitals. The Winter Courses of Lectures at these adjoining Hospitals will commence the first week of October; viz. At St. Thomas's. Anatomy, and the Operations of Surgery, by Mr. Cline, and Mr. Astley Cooper. Principles and Practice of Surgery, by Mr. Astley Cooper. At Guy's. Practice of Medicine, by Dr. Babington and Dr. Curry. Chemistry, by Dr. Babington, Dr. Marcet, and Mr. Allen. Experimental Philosophy, by Mr. Allen. Theory of Medicine, and Materia Medica, by Dr. Curry and Dr. Cholmeley. Midwifery, and Diseases of Women and Children, by Dr. Haighton. Physiology, or Laws of the Animal Economy, by Dr. Haighton. Structure Structure and Diseases of the Teeth, by Mr. Fox. N. B. These several Lectures are so arranged, that no two of them interfere in the hours of attendance; and the whole is calculated to form a Complete Course of Medical and Chirurgical Instructions. London Hospital. Dr. Buxton's Autumnal Course of Lectures on the Practice of Medicine will be commenced on Wednesday, the 2d of October. Anatomical Theatre, Bristol. Mr. J. Shute will commence his Winter Course of Lectures on Anatomy, Physiology, and the Principles of and Operations in Surgery, on Tuesday, October 1, at eight o'clock in the morning. Mr. Vergne has lately analysed the mineral waters of St. Analysis of the Felix de Bagnère, near Condat, in the department of the mineral water of Bagnère. Lot, and the following were the results. Four pounds ten ounces of the water, evaporated to dryness, left a residuum of 113 grains. From this he obtained there being a loss of 7.5 grs. The fatty matter had neither taste nor smell; thrown on burning coals, it changed colour, shrunk up like an animal substance, and emitted a very fetid smell of carburetted hidrogen. The heat of the water, taken from the spring at noon on the 21st of June, 1809, was 66.4° F.; and its gaseous products were a moderate quantity of carbonic acid, and still less sulphuretted hidrogen. sat. The water of the baths of Ussat, near Tarascon, about Water of Ústen miles from Ax, have been examined by Mr. Figuier, professor of chemistry at Montpellier. He found its heat, taken at several times and at different hours, from 27° R. to 30.5° [92-7° to 100-6° F.]. It contained about a sixth of cubic inch of carbonic acid gas in a pound of water. 12230 grammes yielded, by evaporation, 11 grammes of dry resi duum, from which were obtained 10.95 The new spring contained rather less both of carbonic acid and of solid residuum, but the difference was trifling. The mud collected at the bottom of the baths consisted of Water of Nie. derbrunn. We have also an analysis of the mineral water of Niederbrunn, in the department of the Lower Rhine, by Professors Gerboin and Hecht, of Strasburg. About half a kilogramme, or one pound*, of this water contained In Augsburg and its vicinity, which are celebrated for good beer, it is customary to put into each cask a small bag of the root of the geum urbanum, aveus, or herb bennet. Probably the Strasburg pound = 7277 grs. Eng. C. A JOURNAL OF NATURAL PHILOSOPHY, CHEMISTRY, AND THE ARTS. OCTOBER, 1811. ARTICLE I. On the Destruction of an Enemy's Fleet at Sea by Artillery: by W. MOORE, Esq., of the Royal Military Academy, Woolwich. LEMMA I. non ball. If two Spheres of different Diameters and Different specific Law of resist LET R and r denote the absolute resisting forces of the Proof G the |
