We have not been at Portsmouth for these three years, and till we saw this report, were not aware that the State Chambers, lately on the Platform Battery, had been pulled down towards the close of last year. The building was of some interest. It was of stone, with walls of considerable thickness, and square vaults below, descending to a level with the parade, and used at different periods as dungeons. The part on which the vane stood, was erected in the reign of Queen Elizabeth, and the other part was built in the time of Charles II., whose name, with the date, was on a marble slab above the doorway. Of late years the building had been modernized and used as a signal-house and subscription reading-room. If we are not mistaken, the edifice had often been much injured by the encroachments of the sea, and probably this led to its removal. _Conversations on Geology_. We notice with much pleasure a handsome volume under the above popular title, which represents that delightful science in the very attractive form of a series of dialogues between a mother and her children. The Huttonian and Wernerian systems and the Mosaic Geology, are here familiarly explained, and illustrative phenomena and recent discoveries glanced at in the progress of the conversations. How much more profitable are such family recreations than sitting hours over spotted pieces of paper, counting the pips of dice, or simpering over fashionable novels and tales of scandal run mad. Bookish families are usually the happiest, at least if we rightly estimate the term. In an early number we shall endeavour to find some portion of these "Conversations" for our columns. "_Arcana of Science for_ 1829." This work will appear early in January. It will be on the same plan as the volume of last year, and will contain at least _thirty engravings_, on copper and wood. The _mechanical_ department is unusually copious, and there are some abstracts in the _chemical_, which are of high value. _Rice_. Trials have recently been made to grow the dry rice of China in Italy; and it is expected that in time an advantageous cultivation of it may be introduced in France. _Turf_. A correspondent of a French work on gardening thinks that green turf may be obtained in France by trenching the ground, freeing it from stones, covering the surface with two or three inches of rich compost, and then laying on the turf. The improved soil, he thinks, will retain moisture sufficient to keep the turf growing all the summer, and, consequently, green. _Garden of the Hesperides_.