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SCIENTIFIC INTELLIGENCE.

Chemistry and Physics-Solution and Pseudo-solution, Linder and Pictos:

Fluidity of Metals below their Melting Points, SPRING, 467.--Light emitted

during Crystallization, BANDROWSKI: Two-fold Spectra of Oxygen, BALY, 468.

-Kräfte der Chemischen Dynamik, L. STETTENHEIMER: Physical Constants of
Hydrogen, OLSZEWSKI: Color Photography, NEUHAUS, 469.--Silvering Glass,
M. M. AUGUSTE and L. LUMIÈRE: Form of Sensitive Galvanometer, M. P. WEISS:

Digelectrification of Air, KELVIN, M. MACLEAN and A. GALT, 470.–Beitraege

zur Kenntniss des Wesens der Saecular Variation des Erdmagnetismus, L. A.

BAUER, 471.- Text Book of the Principles of Physics, A. DANIELL, 472.

Geology and Mineralogy-Discovery of a dicotyledonous Flora in the Cheyenne

sandstone, R. T. Hill: Geological Aspects of Variation, M. GOSSELET, 473.

-Geological Survey of Illinois, vol. iv, C. R. KEYES: Geological Survey of

New Jersey, 475.-Geological Survey of Iowa, vol. iii: Ueber devonische

Pflanzen aus dem Donetz-Becken, SCHMALHAUSEN, 476.--Contributions a

l'Étude des Feldspaths des Roches Volcaniques, F. FOUQUÉ, 477.--Analcite-

Diabase from San Luis, Cal., H. W. FAIRBANKS: Gold m Serpentine. H. W.

TURNER: Brief Notices of some recently described Minerals, 478.-Elements of

Mineralogy, Crystallography and Blowpipe Analysis, A. J. MOSES and C. L.

PARSONS, 480.

Botany-Students' Text-Book of Botany, S. II. VINES, 481.--Cellulose; an out-

line of the Chemistry of the structural elements of plants, with reference to

their Natural History and Industrial Uses, C. F. Cross, E. J. BEVAN and C.

BEADLE, 482.-Interesting Method of Dissemination, DUSÉN: Australian Nar-

cotics, J. H. MAIDEN, 483.

Miscellaneous Scientific Intelligence-Science of Mechanics, E. MACH: Dynam-

ics: R. T. GLAZEBROOK: Few Chapters in Astronomy, C. KENNEDY: North

American Birds, II. NEHRLING, R. RIDGWAY, A. GOERING and G. MUETZEL, 484.

Obituary-John H. REDFIELD): LOTHAR VON MEYER: CARL VOGT, 485,

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