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282 It is well adapted to the assay of alloys, but when ores are to be assayed very great care is required to obtain a fair sample in so small a quantity of material. With these drawbacks, blow-pipe analysis offers many advantages over wet analysis, as it requires no special laboratory, and the apparatus are much more portable.

Chapter VIII contains a description of the important ores and coal, and the last chapter is devoted to determinative mineralogy. In this chapter, the minerals, like plants in a botanical key, are subjected to an artificial classification depending on certain external properties. The classes are then subdivided according to their reaction before the blow-pipe, such as fusibility, odor, or coat on charcoal. The method of writing the mineral formulas is that followed by Plattner and Kobell.

Professor Cornwall's book is, on the whole, so complete and practical, that it will soon take the place of the larger and more expensive manual of Plattner in our leading scientific schools.

catalogue was commenced at the Naval Observatory for the purpose of obtaining standard positions of reference stars for use in the lunar and planetary theories, especially in the reduction of the older occultations. In 1877 the unfinished work was turned over to the office of the American Ephemeris, and has been completed by Chauncey Thomas, U. S. N., under the personal direction of Professor Newcomb.

A Guide to Modern English History. By William Cory. Part II. 1830-'35. New York: Henry Holt & Co. Pp. 567.

History of the Pacific States of North America. By Hubert Howe Bancroft. Vol. I. Central America. San Francisco: A. L. Bancroft & Co. Pp. 704.

Practical Life and the Study of Man. By J. Wilson, Ph. D. Newark, New York: J. Wilson & Son. Pp. 400. $1.50.

The American Citizen's Manual. Part I. Governments, the Electorate, the Civil Service. Edited by Worthington C. Ford. New York: G. P. Putnam's Sons. Pp. 146. $1.

Speech and its Defects. Considered Physiologically, Pathologically, Historically, and Remedially. By Samuel O. L. Potter, M. A., M. D. Philadelphia: P. Blakiston, Son & Co. Pp. 117.

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Schelling's Transcendental Idealism. A Critical Exposition. By John Watson, LL. D.. F. R. S. C. Chicago: S. C. Griggs & Co. Pp. 251. $1.25.

Swift. By Leslie Stephen. New York: Harper & Brothers. Pp. 205. 75 cents.

Sterne. By H. D. Traill. New York: Harper & Brothers. Pp. 173. 75 cents.

Hints for Sketching in Water-Color from Nature. By Thomas Hatton. Edited by Susan N. Carter. New York: G. P. Putnam's Sons. Pp. 69. 50 cents.

Drawing in Black and White. Charcoal, Pencil, Crayon, and Pen-and-Ink. By Mrs. Susan N. Carter. New York: G. P. Putnam's Sons. Pp. 55. 50 cents.

Potable Water and the Relative Efficiency of Different Methods of detecting Impurities. By Charles Watson Folkard. New York: D. Van Nostrand. Pp. 138. 50 cents.

In Memoriam. Benjamin B. Redding. San Francisco: California Academy of Sciences. Pp. 18.

Is Tubercular Consumption a Contagious and Parasitic Disease? By Bela W. Cogshall, M. D., of Flint, Michigan. Pp. 12.

On Nocturnal Epilepsy, and its Relations to Somnambulism. By M. G. Echeverria, M. D. Lewes: "Sussex Advertiser" Office. Pp. 32.

Forestry Bulletins of the Census Office, 18 to 22.

A Plan for securing Observations of the Variable Stars. By Edward C. Pickering. Cambridge: John Wilson & Son. Pp. 15.

An Evolution Aspect of the Healing of Wounds, with Deductions as to Treatment. By C. Pitfield Mitchell, M. R. C. S., 30 E. 35th Street, New York. Pp. 13.

The Pathology and Philosophy of Sea-Sickness. By C. Pitfield Mitchell, M. R. C. S., 30 E. 35th Street, New York. Pp. 16.

Subscales, including Verniers. By Henry H. Ludlow, U. S. A. New York: D. Van Nostrand. Pp. 16.

On the Prevention of Fires in Theatres. By C. John Hexamer. Philadelphia: "Merrihew" Print. Pp. 18.

Some Points on the Administration of Anæsthetics. By George H. Rohé. M. D. Baltimore: Office of the "Medical Chronicle." Pp. 18.

Use of the Ecraseur for curing Deep-Seated Fistula-in-Ano. By J. M. F. Gaston, M. D., of Campinas, Brazil. Pp. 8.

Report of the Bureau of Statistics relative to the Imports, Exports, Immigration, and Navigation of the United States for the Year ended June 30, 1882. Washington: Government Printing-Office. Pp. 112.

Analyses of Beethoven's First and Second Symphonies. By George Grove, D. C. L. Boston: George H. Ellis. Pp. 16 each. 15 cents

Address delivered by the President of the Homeopathic Medical Society of Pennsylvania. September 5, 1882. By John C. Morgan, M. D. Pittsburg: Stevenson & Foster. Pp. 13.

Radiant Heat an Exception to the Second Law of Thermo-dynamics. By H. T. Eddy, Ph. D. Cincinnati. Pp. 12.

The American Journal of Physiology. Edited by D. H. Fernandes, M. D. Vol. I, No. 1. Indianapolis, Indiana. Pp. 8.

The Gulf Stream. Additional Data from the Investigations of the Coast and Geodetic Steamer Blake. By Commander J. R. Bartlett, U. b. N. Pp. 16. With Map.