cheaper than either wood or brick. It is fifty feet long, and four feet wide. The whole cost of material, and workmanship scarcely exceeded 30l. Upon a rough estimate, a wooden bridge of the same span would have cost from 80l. to 100l., and a high arch probably from 150l. to 200l. The piers or posts supporting the chains are of oak, but should they in ten or fifteen years decay, 10l. in money, and three days in time would set it up again.—Brande's Jour.

Stone Roofs.

The Romans employed pumice in building their arched incombustible roofs. This porous material possessed the additional advantage, when combined with good cement, of rendering the arched surface one united petrifaction, opposing (in consequence of its firm union) little lateral pressure, comparatively, against the sustaining walls.

Bonomi, the architect, suggests that the principal cause of the destructiveness of fires in large buildings, is the want of arched surfaces of incombustible materials. This has been disastrously exemplified in the destruction of the choir of York Minster, where the roof of the aisles, which are solidly arched with stone, suffered no injury; while the choir-roof, although much more raised above the action of the fire, has been entirely destroyed by it.

Fossil Saurians.

Several beautiful specimens of fossil saurians, or animals of the lizard tribe, have, as our scientific readers are aware, been found at Lyme, in Dorsetshire; but the world would to this day have remained ignorant of the treasures England possessed, but for the patient labours of three female pioneers in this service, viz. Mary Anning, a dealer; Miss Congrieve, and Miss Philpots, residents, who for years had been collecting and preserving these bodies from the wreck of the coast; the two last without any other view than the gratification of a laudable curiosity, and who, with unequalled liberality, communicated their collections to every man of science that visited the place; and it is to liberal minds like theirs, and Miss Bennet's, of Wiltshire that we owe the first rescuing of these natural gems from the spoilers. We copy this from a communication of Mr. Cumberland to Brande's Journal, and are truly pleased to record such amiable examples of female excellence in scientific pursuits. At Dover, Portsmouth, and other places we could name, we obtained the best information respecting the fossils of the coast, from females resident there, and we need not add that this circumstance imparted additional interest to our inquiries.

The Zoological Society.

We copy the following from the Report to the Zoological Society, just published:

"In the Museum in Bruton-street various improvements have taken place. Additional cases have been erected, wherever space could be obtained, for the exhibition of the different collections; and two persons have been in constant employment in preparing and setting up the more interesting specimens. An assistant has also been lately added, for the arrangement of the shells, insects, and the other smaller subjects of the collection; and much care has been bestowed upon the various departments of comparative anatomy. An instructive as well as an attractive series in every branch of zoology, but more particularly in the groups of mammalia, birds, and insects, has thus been arranged for inspection. A catalogue of the more important objects in the Museum has been published; and a more detailed list, accompanied with scientific notices of all the species, is in preparation.

"The increase in the number of subjects in the collection during the last year has been considerable, and many of the additions have been of the utmost importance to science. The whole of these, with a few exceptions, have been presented by the friends of the society. A detailed list of these donations which are too numerous for insertion in this report, is laid upon the table; a reference to the contents of which will evince that the spirit of liberality, which laid the foundations of this already valuable collection, has not decreased.

"A very extensive correspondence has been established with naturalists of foreign countries, and persons resident in distant parts, who are anxious to promote the objects of the Society. Through these channels many valuable acquisitions have been already received; and it is expected that much of novelty and interest will continually pour in to increase the attractions of the Museum and Menagerie.

"The Garden in the Regent's Park is the principal source of attraction and of expense. The nature of the soil, which consists of a thick ungrateful clay, increases the cost of every work. The health of the animals requires that oak floors be raised above the surface of the ground; and it is necessary to lay a thick substratum of dry material under every inclosure and every walk. These disadvantages are however amply counterbalanced by its immediate vicinity to the town. The Council have, notwithstanding the nature of the soil, endeavoured to give to the garden all the attractions which good cultivation and an abundance of flowers can afford: and they have to return their thanks for the very liberal supplies for this purpose which they have occasionally received from the Horticultural Society. The resort to the garden has far surpassed the most sanguine expectations of the Council; 112,226 persons have visited it during the last year."

THE NOVELIST

THE SIEGE OF ABYDOS.

A Romantic Tale.

(For the Mirror.)

The infidel Turks, ever at variance with the Christians, were, in the reign of king Orchanes, extremely ambitious to possess the famous Castle of Abydos; and accordingly vast preparations were made for a close siege. Previous to the arrival of the Turkish army before the castle, the angelic Sophronia, daughter of the governor of Abydos, was visited by a dream. She thought, that while walking out on a beautiful evening, breathing the fragrant air, and gazing on the brilliant stars, she fell into a loathsome ditch, in which she remained an hour, terrified, and unable to move. At length, a handsome youth passed, and she implored him to rescue her. She did not implore in vain; the young man assisted her out, cleaned her clothes, and comforted her with pleasant words. They then proceeded to a delightful bower, put on costly attire, and the youth regaled the rescued lady with delicious fruits, and sang sonnets on her personal beauty. Sophronia awoke, sad and disappointed, to find that her late bliss was only a dream. In a day or two afterwards, the Turkish army appeared, and a vigorous siege commenced; nevertheless, the Christians stoutly defended the place, and would, ultimately, have obliged the enemy to retire, had no intervention taken place. It happened, unfortunately for the garrison, that a gallant Turkish captain, in the prime of youth, called Abdurachman approached so near to the castle gates, as to be plainly observed by the fair Sophronia, from a small turret window, out of which she had viewed the besiegers. The lady imagined this captain to be the person to whom she was so much obliged in her dream, and rejoiced at the supposed discovery; she hoped that the assailants would be successful in taking her father's castle that she might have an opportunity of falling into the hands of the gallant captain she so greatly admired. The siege still raged with much fury, but was continually repulsed by the brave Christians, insomuch that the Turkish general became disconcerted, and in the evening of the third day after the commencement of the siege, retired to his camp, about a league distant from the scene of action. Sophronia, meanwhile, was agitated at the ill success of the Turks, though she