Page:Popular Science Monthly Volume 5.djvu/778

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758

THE POPULAR SCIENCE MONTHLY.

Bulletin of the Cornell University. Vol. i., Numbers 1 and 2.

Number 1 gives some account of the Morgan Expeditions under Ch. Fred Hartt to the Amazonas country in 1870-'71, and describes the geographical, topographical, and geological features of the Lower Tapajos, while Number 2 describes the Carboniferous Brachiopoda of Itaituba, on the river Tapajos.

Assaying by the Spectroscope.—This is a paper detailing experiments made in the United States Mint at Philadelphia, by Alexander E. Outerbridge, Jr., with a view of ascertaining the possibility of determining the value of metals by the spectroscope. The conclusion arrived at is, that assaying by this means is impracticable.

Transmission of Consumption. Read before the Maine Medical Association, June, 1874, by A. C. Hamlin, M. D.

The view taken is, that, by observance of natural law and judicious selection in marriage, the ravages of this disease may be lessened; and the principal conclusions reached are, that persons of consumptive habits should not intermarry, and that consumptive mothers should not suckle their infants.

Contributions to the Geology and Physical Geography of the Lower Amazonas, by Ch. Fred Hartt; and The Devonian Brachiopoda of Ereré, by Richard Rathbun.

These two papers give some of the results of the Morgan Expeditions of 1870-'71 to the region named. The first is apparently a careful and elaborate description of the features of the Ereré-Monte-Alegre District and table-topped hills in Brazil, and of the formation of the strata composing the same. The second describes the fossil remains of molluscous animals discovered in the Devonian strata of that region.

Notes on the Mammals of Portions of Kansas, Colorado, Wyoming, and Utah. By J. A. Allen.

This is an enumeration of the families and species inhabiting those sections, and a description of their traits and habits.

The Reception of Dr. Gould.—In the year 1870 Dr. Benjamin A. Gould went to Cordoba, in the Argentine Republic, at the request of its Government, for the purpose of establishing a national Astronomical Observatory, and of making observations on the constellations of the southern heavens. His recent return to the United States was celebrated in Boston by a reception given to him on the 22d of June last. On that occasion he delivered an address, narrating the nature of his labors, the difficulties overcome, and the results achieved. The principal results are, the successful establishment of the observatory, the establishment of a national meteorological office and system of observatories throughout the republic, and the compilation of an atlas of the heavens from 10° north of the equator to the south pole, showing every star to the seventh magnitude inclusive.

Geographical Variation in North American Birds, By J. A. Allen.

This is a paper describing the variation produced in birds by differences of longitude and latitude. In differences of latitude variations occur in color, size, and details of structural parts, while in differences of longitude the variation is principally in color. These variations are in some cases so marked, that similar forms have been classed as separate species.

Transformations of the Common House-Fly. By A. S. Packard, Jr., M. D.

An interesting history of the changes incident to the life of this common insect. An individual lays about 120 eggs, usually in fresh horse-dung. The egg hatches in about twenty-four hours; the larva passes through three stages, occupying from five to seven days; the pupa state lasts about the same time; and, finally, the perfect fly appears at the end of ten to fourteen days from the time of hatching.

The Bench and Bar Review.—This is a new quarterly review, devoted to the interests of the legal profession, the publication of which was begun with the present year, in Baltimore. The leading articles in the first number are: "The Bar in England and France:" "The Civil Law: its Nature