presented by Sir Thomas Baring. Having noticed these prominent attractions of the room, the visitor should direct his attention to the table cases, and first to those ranged along the southern half of the room (7-13). Five of the tables are loaded with further specimens of the Sulphurets, or metals in combination with sulphuric acid. In the first case (7) are sulphurets of copper, and copper iron; in the second case (8) are the series of sulphurets of lead, or galena, from various parts of the world; in the third case (9) are specimens of sulphuret of bismuth, needle ore, or sulphuret of bismuth, copper, and lead, and sulphurets of mercury, or cinnabar, chiefly from Spain, the light variety of which is the bright vermilion used by artists; in the fourth case (10) are the sulphurets of silver, the beautiful crystallised sulphurets of antimony, chiefly from Transylvania, and the delicate plumose antimony, or feather ore; in the fifth case (11) are the sulphur salts, including the ruby, silver, &c.; and in the sixth case (12) are the sulphurets of Arsenic, red orpiment, of which the best comes from Persia, cobalt glance, &c., bringing the series of sulphurets to a conclusion. In the next case (13) the series of Oxides begins. Herein are the oxides and hydrous oxides of manganese.[6] Having examined the sulphurets and oxides, the visitor should cross to the northern suite of tables marked from 48 to 54. Here are arranged a series of the Carbonates, or combinations of carbonic acid with earths, metallic oxides or alkalis.