Few cabinets of minerals contain so many of the rare substances, which were discovered in Greenland, by Sir Charles Giesècke', and perhaps none in equally interesting varieties, as that of Mr Allan. The most prominent of them hare been examined both in a mineralogical and chemical point of view, and some described as particular species. Mineralogy is already indebted for Allanite, Sodalite, Eudialyte, and Gieseckite, to the zeal of die indefatigable explorer of Greenland, and the subsequent labours of Dr Thomson and Professor Stromeyer; and it is probable that the number of new species from this source will yet be increased upon farther examination.