densed milk with 11.73 and 11.34 per cent of caseine and 7.19 and 6.98 of fat, respectively, and calculated that they were made from milks containing originally 2.5 per cent of fat; but he hesitated to call them skimmed. Judged by the above standard, they give.certain indications of being skimmed. Hassall's analyses of condensed milk cited by Hehner show in general greater condensation than those in this paper, but the average percentage of caseine is 16.85; of fat, 10.27; and here, again, skimming is certainly to be suspected. The average amount of cane-sugar there given is lower than that in the milks analyzed by the writer, and the latter therefore contain, on the average, less milk solids, but among them are several, milks of excellent quality. The percentages of fat and caseine are the most important, provided the milk be of good quality in other respects. SPECIAL REMARKS. The following details are of interest in connection with the analyses in Tables I. and II. :— No. 21 was not in perfect condition; a little gas escaped on opening the can, and the milk was soon full of bubbles, caused by fermentation. No. 27 contained a considerable amount of undissolved cane sugar. No. 33 was so stiff that it would not run out of the can, had a cheesy smell, curdled even when very slightly warmed with water, was of a brownish color, and altogether was of inferior quality. No. 34 was apparently in good preservation, but the metal of the can was darkened inside, as if the tin had been attacked. No. 36 was a dark brown, glutinous mass, with a smoky and cheesy taste and odor. Apparently molasses or glucose had been used in place of at least some cane-sugar in preparing it, as the result of the analysis indicates. The 35.17 per cent of 'milk-sugar' could not have been pure milk-sugar, and the figures really represent only a reducing power equivalent to that amount of milk-sugar. No. 38 was quite stiff, of a brownish color, and had a somewhat cheesy smell. No. 40 was not in perfect condition; the tin of the can was darkened inside, and gas escaped on opening the can. The caseine and albumen given in the table were calculated from the loss; an actual determination by Ritthausen's method gave 9.28 per cent of caseine. The other milks, not especially mentioned above, were in good condition and well put up. The percentage of ash of all of the milks, with the possible exception of No. 35, shows that the cane-sugar used was itself free from excessive ash. H. B. CORNWALL. Princeton, N.J., Sept. 14. Chalcedonized Fossils. A CURIOUS instance of the formation of rose chalcedony on fossils was called to my attention some time ago. The fossils were mostly specimens of species of Monticulipora, and often the whole surface was covered with the ring-like chalcedonic formation. The cells of the coral were in most cases still plainly seen, but the whole outer aspect of the fossil was so changed as to make me think for a time that it might prove to be an undescribed species. BOOK-NOTES. MUELLER, F. M. The Science of Thought. Vols. I. THACKERAY, 1 in the Lake Laboratory, Milwaukee; On the Phylogenetic Arrangement of the SauropMessrs. Macmillan & Co. announce a sida,' by Dr. G. Baur, assistant in the Yale work by Dr. Charles Mercier, on the nervous system and its relation to mind, both in health College Museum; A Contribution to the History of the Germ-Layers in Clepsine,' by and disease. It is written from an evolutionary C. O. Whitman, director of the Lake Labora- WALL, G. The Natural History of Thought. London, point of view, and embodies the doctrines of Trübner. 416 p. 8°. tory, Milwaukee; The Germ-Bands of Lum- WILLSON, F. N Mr. Herbert Spencer and Dr. Hughlings-bricus, by Prof. E. B. Wilson, Bryn Mawr Jackson. It will be especially useful to stu- College; 'Studies on the Eyes of Arthropods, I. dents of insanity and of psychology. Development of the Eyes of Vespa, with Observations on the Ocelli of some Insects, by TILESTON & HOLLINGSWORTH, — The Universal Tinker and Amateur's Assistant is a new monthly devoted to amateur pursuits, and tells, from an amateur's standpoint, about turning and lathe work, painting, staining, etc. A Completed Nomenclature for the Principal Roulettes. Princeton, N.J., The Author. 15 p. 8°. 64 Federal Street, Boston. Dr. William Patten, assistant in the Lake men, reflecting no dazzling glare injurious to the eyes. Approved and used by the best educational publishers in the country. After the War Series' and the Life of Lincoln,' the most important enterprise ever undertaken by The Century is the forthcom- Trübner & Co. announce Ilchester ing series of illustrated papers upon Siberia Lectures on Greeko-Slavonic Literature, and and the exile system, by George Kennan, au- its Relation to the Folk-Lore of Europe durthor of Tent Life in Siberia,' who has re-ing the Middle Ages,' by M. Gaster; and cently returned from an arduous journey of new volumes of Trübner's Oriental series, B. Westermann & Co., New York. fifteen thousand miles through European and Masnavi I Ma'navi, the Spiritual Couplets of American Ephemeris for 1850, 51, 56, 58, 61. BOOKS WANTED. CROSBY'S VITALIZED PHOSPHITES Composed of the Nerve-giving Principles of the Ox Brain and the Embryo of the Wheat and Oat. Is a standard remedy with physicians who treat nervous or mental disorders. The formula is on every label. 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