On Wednesday I dined with M. S----i, whose new 8vo edition of Buffon proceeds, I find, with becoming spirit. It is quite a journey to his residence; for he lives in one of the most retired quarters of Paris, However, I had no reason to repine at the distance, as the party was exceedingly cheerful. Naturalists and literati were not wanting. Egypt was a subject that engrossed much of the conversation: it was mentioned as a matter of regret that, during the dominion of the French in that country, curiosity had not prompted the Institute, established at Cairo, to open one of the pyramids, with a view of ascertaining the object of the erection of those vast masses. At the desert, we had luscious grapes as large as damsons, in bunches of from three to five pounds in weight. They were of the species of the famous _chasselas de Fontainebleau_, which are said to have sprung from a stock of vine-plants, imported by Francis I. from the island of Cyprus. These did not come from that town, but grew against the naked wall in S----i's garden. From this you may form a judgment of the climate of Paris. The persons with whom I have had any correspondence, respecting literature, vie with each other in shewing me every mark of cordial hospitality; and those to whom I have been introduced, are by no means backward in friendly attention. All the lovers of science here seem to rejoice that the communication, which has been so long interrupted between the two countries, promises to be shortly re-opened. After dining yesterday with Mr. M----y, the British minister, in company with Mr. D----n, the member for Ilchester, we all three went to an exhibition almost facing Mr. M----y's residence in the _Rue St. Dominique_. This was the third time of its being open to the public. As it is of a novel kind, some account of it may not be uninteresting. In French, it is denominated THERMOLAMPES, _or stoves which afford heat and light on an economical plan_. The author of this invention, for which a patent has been obtained, is M. LEBON, an engineer of bridges and highways. The place of exhibition was the ground floor of one of the large hotels in the _Faubourg St. Germain_, on which was a suite of rooms, extremely favourable for displaying the effect of this new method of lighting and warming apartments. In lieu of fire or candle, on the chimney stood a large crystal globe, in which appeared a bright and clear flame diffusing a very agreeable heat; and on different pieces of furniture were placed candlesticks with metal candles, from the top of each of which issued a steady light, like that of a lamp burning with spirits of wine. These different receptacles were supplied with inflammable gas by means of tubes communicating with an apparatus underneath. By this contrivance, in short, all the apartments were warmed very comfortably, and illuminated in a brilliant manner.