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(17) [[^Wilson]] liar in their shape and cannot have been grooved stone axes in process of manufacture. They may have been the evolutionary ancestor of the polished stone hatchet. They are always made of chippable material, like flint, quartzite, ryollite, &c., and seem never to have been made of non-chipable material as granite, diorite, &c. They are found in the neighborhood of Mount Vernon, Va. THOMAS WILSON. ([underlined]]American Naturalist [[/underline]].) [[^5.]] [[underline]] On The Presence of Fluorine as a Test for the Fossilization of Animal Bones. [[/underline]] Vol. xxix, No. 340, April, 1895, pp. 301-317; No. 341, May, 1895, pp. 439-456. It is greatly to be desired that some test should be discovered by which the antiquity of animal, and especially human, bones might be determined. This test is believed to have been found in Fluorine. It may not be certain nor always equal; but if it furnishes, or promises to furnish, an aid in this direction, it is to be studied, examined, experimented with, and proved. Modern animal bones have but a small percentage of fluorine, less than 2/10 of one per cent., while it appears to increase in quantity and proportion until in those of the earlier geological ages the proportion reaches 3 and even 4 per cent. This increase may be different in different localities, but from analyses of a large number of specimens, it seems a steadily increasing ratio, and, therefore, affords a means of approximate determination. THOMAS WILSON. ([[underlined]] (The Great Divide [[/underline]].) [[^6]] [[underline]] General Skobeleff. [[/underline]] Vol. xi, No. 10, October, 1894, pp. 247-248. A description of the life, character, services and death of General Skobeleff, the Russian General. He learned the art of war under General Kauffmann in Central Asia. He was in the Caucusus under the Grand Duke Michael. His expeditions in Turkestan attracted the attentions of his Government, and at the outbreak of the war with Turkey he was given every opportunity to win fame for himself and victory for his army. He was eminently successful, especially at Schipka Pass and the siege of Plevna, insomuch that he was made Commander-in-Chief of the Russian Armies in Central Asia, and his last military exploit was the capture of the strong-hold, Geok Tepe, and the advance of the Russian frontier to Afghanistan. He was a born warrior. Whether he would have succeeded in statesmanship and diplomacy at the head of a great