B stand; but that it should have been put out by vinegar, and urine, and & not by water, as he also affirms, is impossible, as these were not likely I to have been procured in sufficient quantity, surely not in such abund ance as water, and on no other principle could the one have acted betom ter than the other." "91d) at to 920dt of mysed "I do not see," continues Dr. M. "that any further light can be thrown on these varieties of the Greek fire! The accounts seem to be confused and unintelligible, as far as they are so, partly by the ignorance, cand partly by the exaggeration, of the reporters. Abstracting l these, it is probable that they were truly enough, as has been said, resi-io nous inflammable compounds, solid, tenacious, or liquid, without nitreo and exactly similar to the fires of our ancient fire ships, before chemis-to try had taught us to proceed on better principles."to asdoit bas sto "Joinville's description will be found much more intelligible, and ai will, I think, fully prove the supposition that there were different things known by one name, and that the Greek fire used against Louis.m at Acre was neither the Chinese oil, nor any viscid substance, nor even i the composition described by our celebrated female historian."qod nist According to Joinville, the Greek fire was thrown from the walls of q Acre by a machine, called a petrary, three times, and from a cross bow four times, in the course of the night. It is described as coming i forward" as large as a barrel of verjuice, with a tail issuing from it as o big as a great sword; making a noise in its passage like thunder, and seeming like a dragon flying through the air while, from the great quantity of fire which it threw out, it gave such a light that one might see in the camp as if it had been day "god visio02.adi; saoqing sdt 70t After an examination of this account, Dr. Mac Culloch concludes, that this was a firework of the rocket kind, without a bore, and therefore incapable of flying by its own recoil; in short, a huge squib. Such a firework as this would produce all the appearances. the it would require a projectile force, which might have been given both by mechanical and chemical artillery, by the balista, and by the petrary great measure arisen from mistakery; and that this herent. We may remain at our ease on this head, the19abs mon safely boast, that in whatevoAY S nove dem. Dithe box Greek a contemptible weapon enough. Had the rhyming mohlaudr: State Louis been at the sieges of Copenhagen or Algiers, it would be diffion cult to conjecture where they would have found words to express whato must have been, to their fires, like the thunders and lightnings of t heaven to those of the theatre." "79dto odt mart 193 ut vos ted" to "998 ton ob I " ed of masa atau Royal Institution of Cornwall set no words The Report of the Council to the Fourth Annual Meeting of this Institution, the establishment of which, before it received the honoursx of Royal patronage,asis noticed in the old series of the Annals, vol. xii. p. 395, presents some gratifying indications of the progress of science and literature in the county of Cornwall, the mineral structure and riches of which offer so many subjects for philosophical investigation. lotni sto su bat ad nougies olivniot " The Institution possesses a select library, a zoological collection w many objects of antiquarian research, an elegant apparatus for exper riments, and an increasing collection of minerals. The Council enter-1 tain hopes that the time is not far distant when an exhibition ofs paintings will also be established; they observe, that natives who have made no small proficiency in the art of painting are to be found he art in towns, in the village, in the hamlet; and that the cherishing beam d of the public eye is only wanted to bring them into notice. es biswrot racy. 3. Without drawing off any spirit, what quantity there is of any particular strength may be immediately known.io, hozog afT 4. Every possible fraud, during the operation, may be prevented, as the apparatus can either be locked up or brought into an adjoining apartment, for the person who attends work does not require the thermometer to direct him.-(Edin. Phil. Journ. vii. p. 214.) VII. Tabular Spar, Colophonite, and Pyroxene. Mr. H. Seybert, of Philadelphia, has analyzed the above minerals from the vicinity of Willsborough, Lake Champlain. He found the tabular spar to contain Silica....... Alumina and oxide of iron. Water. Magnesia and loss.. 51.00 46.00 1.33 1.00 0.67 100.00 This statement agrees very nearly with M. Bonsdorff's analysis of the same mineral from Pargas (Annals, Oct. 1820). Mr. Bonsdorff obtained Mr. Seybert observes that this mineral is a bisilicate of lime, which, adopting Dr. Thomson's numbers for silica and lime, appears to be the case. If it consisted precisely of two atoms of silica and one of lime, the proportions would be 51 silica, and 44.62 lime, which agree still more nearly with M. Bonsdorff's analysis. Mr. Seybert observes, that "it is an interesting fact, that this mineral, whether found in Hungary, Sweden, or in the United States, is constantly associated with substances of corresponding characters; that of Dognarka is united with brown crystallized garnets and blue calcareous spar; that of Pargas, with black sphene, an amorphous mineral, of a reddish colour, resembling idocrase or garnet, and small grains of a green substance, resembling actynolite, (probably pyroxene); that of the United States, with colophonite and pyroxene. The colophonite yielded 1822.1 4840 d avoir dump and The pyroxene yielded! Silica. New Scientific Books. 397 20.40 19.33 We lament to state the demise of Dr. Marcet, that took place on Saturday, Oct. 19. His chemical researches were chiefly detailed in the Transactions of the Royal Society, of which he was an active member. His principal work is a treatise on Calculi, a book of established reputation, and displaying the minute accuracy with which all that he performed is replete. He was in the 52d year of his age, and was about to return to Geneva, his native country. ...IX. Death of Mr. James Sowerby... It is with great regret also that we have to announce the death of this gentleman which occurred on Oct. 25, after a long and severe illness. Mr. Sowerby was a Fellow of the Linnæan Society of London, Member of the Geological Society, Honorary Member of the Physical Society of Gottingen, &c. &c. His patient and indefatigable labours in several branches of natural history are well known to the scientific world; and he contributed in various ways to the advancement of natural knowledge. The Life and Remains of the late Dr. Edward Daniel Clarke, Professor of Mineralogy in the University of Cambridge. A Quarto Volume, with Engravings, will shortly appear, giving an Account of Don' Antonio del Rio's Discovery of an ancient City in the Kingdom of Guatimala, North America. JUST PUBLISHED. A Treatise on the Foot-rot in Sheep, including Remarks on the exciting Cause, Method of Cure, and Means of preventing that destructive Malady; being the Subject of three Lectures delivered in the Theatre of the Dublin Royal Society. By Thomas Peall, Esq. Veterinary Professor to that Society. A Practical Treatise on Diseases of the Heart. By Henry Reader, MD. Physician to the South London (Dispensary, &c. M. C. Pfeiffer, of Cassel, has lately produced a beautiful Work on the Land and Fresh-water Mollusca of Germany. 4to. With Eight Plates. The works in German, but the specific characters are given in Latin. A Treatise on the Utility of Sangui-suction, or Leech-bleeding. By Rees Price, MD. 12mo. 3s. 6d. Researches respecting the Medical Powers of Chlorine, particularly in Diseases of the Liver; with an Account of a new Method of applying this Agent, by which its Influence on the System can be secured. By William Wallace, MD. MRIA. MRCS. Ireland, &c. Svo. 6s. nоM die |