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Private Observatory of Herr von Konkoly, O'Gyalla, near Komorn. 85
PHYSICS OF THE GLOBE. BY CLEVELAND ABBE, with the assistance
of Professor C. G. ROCKWOOD, of Princeton, N. J..
THE EARTH:
Equality of the Surface Levels of the Atlantic and Pacific Oceans.. 117
Tidal Currents in the Gulf of Maine..
117
PHYSICS. By GEORGE F. BARKER, Professor of Physics in the University
CHEMISTRY. BY GEORGE F. BARKER, Professor of Physics in the Uni-
versity of Pennsylvania, Philadelphia..
GENERAL....
NON-METALLIC..
244
246
250
253
254
257
258
MINERALOGY. By EDWARD S. DANA, Ph.D., Yale College, New Haven,
GEOLOGY. By T. STERRY HUNT, LL.D., F.R.S., Professor of Geology, In-
HYDROGRAPHY. BY FRANCIS M. GREEN, Lieutenant-Commander, U.S.N.. 313
GEOGRAPHY. By FRANCIS M. GREEN, Lieutenant-Commander, U.S.N.... 327
MICROSCOPY. By Professor HAMILTON L. SMITH, Hobart College, Ge-
neva, N. Y....
IMPROVEMENTS IN MICROSCOPICAL OBJECTIVES AND MICROSCOPICAL
APPARATUS.....
The New Oil-immersion Object-glass of Carl Zeiss..
Immersion Condensers.
355
356
Schulze's Mode of Intercepting the Germinal Matter of the Air..
363
Measurement of the Diameter of the Flagella of Bacterium Termo. 366
The Foraminifera and Polycystina of the North Polar Expedition,
Supposed Radiolarians and Diatomacea of the Coal-measures..
369
Isthmia nervosa: a Study of its Modes of Growth and Reproduction. 371
Gold-staining, and the Termination of the Nerves in the Unstriated
Muscles...
374
MISCELLANEOUS...
375
New Acarus..
Insect Dissection.
The Limit of Accuracy of Measurement with the Microscope.
378
Microscopic Tracings of Lissajous Curves......
ANTHROPOLOGY. By Professor OTIS T. MASON, Columbian University,
ZOOLOGY. By Dr. A. S. PACKARD, JR., Professor of Zoology and Geology,