American Journal of Science, January.—The stereographic projection and its possibilities, from a graphical standpoint, by S. L. Penfield. Two stereographic protractors devised by the author are described, and detailed instructions given for their use. These protractors are especially adapted to crystallographic problems, but this branch of the subject is postponed for special consideration, in a further communication.—On the mode of occurrence of topaz near Ouro Preto, Brazil, by Orville A. Derby. The yellow. Brazilian topaz of the Ouro Preto district was stated by Eschwege to occur in association with talcose or chlorite schist, and this was confirmed to some extent by Mawe, Spix and Martius. This view was contested by Gorceix, who found that the unctuous schists of this region are essentially micaceous. The results of the author's researches in this district show that the occurrence of the topaz here does not differ so materially from the other known ones as has hitherto been supposed. The mineral does not occur in an essentially magnesian rock, nor is its matrix of presumably sedimentary rather than of eruptive origin.—A chemical study of the glaucophane schists, by Henry S. Washington. Analyses of glaucophanes from Syra, Oregon, Croatia, Anglesey, California, Japan and Piedmont, sixteen analyses in all. The glaucophane schists are found to belong to two classes. The larger one is basic, and consists chiefly of glaucophane and epidote, and scarcely differs in chemical composition from the amphibolites and eclogites. A smaller, but widely spread group, is acid in composition, and these are composed largely of quartz and glaucophane.—On the nature of the metallic veins of the Farmington meteorite, by O. C. Farrington. The question of the origin of the metallic veins in a meteorite is of interest as throwing light on the origin, terrestrial or pre-terrestrial, of the meteorite. Preston's views on the veins in the Farmington meteorite are discussed and shown to be improbable.— Erigenia bulbosa, by Theo. Holm. An examination of the question as to whether the globular underground part of this plant is a true tuber or a tuberous root. After some trouble, specimens of the plant were obtained in the seedling stage, and the bulb was found to be a tuberous root.—New species of Merycochcerus, in Montana, by Earl Douglass. This species, described as M. altiramus, found in the Madison Lake beds of the Loup Fork epoch, is represented by a right mandibular ramus which only lacks the posterior border and some other small fragments. The paper is illustrated by five diagrams of the dentition, accompanied by careful measurements.