In the article in the December American Mineralogist by Edward F. Holden, regarding the beryl locality at- Beryl Mountain, South Acworth, New Hamsphire, it was mentioned that a crystal from that place on exhibition in the United States National Museum at Washington, is 12 dm. (48 in.) long by 4.5 dm. (18 in.) in diameter. In this connection it is of interest to note that the Boston Society of Natural History, at Boston, Mass., exhibits two unique beryl specimens (see Frontispiece), one a large matrix group of three crystals in pegmatite, weighing about 1,000kg., which is probably not duplicated by any museum in the world.