﻿CONTENTS. 



Page 



Art. XLVIIT. — On the Crystallization of Native Copper ; 



by Edward S. Dana. (With Plates X to XIII) 413 



XLIX. — On the Trap and Sandstone in the Gorge of the 

 Farmington River at Tariffville, Conn. ; by William 

 N. Rice 430 



L. — Comparative Studies upon the Glaciation of North 

 America, Great Britain and Ireland ; by H. Carvill 

 Lewis .. 433 



LI. — On certain fossiliferous Limestones of Columbia Co., 

 N. Y., and their relation to the Hudson River Shales 

 and the Taconic System ; by I. P. Bishop » 438 



LII. — Crystallized Vanadinite from Arizona and New Mex- 

 ico.; by S. L. Penfield 441 



LIU. — The Viscosity of Steel and its Relations to Temper; 



by C. Barus and Y. Strouhal 444 



LIV. — Remarks upon the Journey of Andre Michaux in 



December, 1788; by C. S. Sargent 466 



LV. — Note on the Age of the Swedish Paradoxides Beds ; 



by S. W. Ford _ 473 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Determination of Fusing points, Roth: Determination 

 of Molecular Weights of Substances by means of the Freezing points of their 

 Solutions, Pateeno and Nasini, 476. — Magnetic Rotation of mixtures of the 

 Fatty Acids, of Alcohol and of Sulphuric Acid, with Water, Perkin, 477. — 

 Behavior of Alkali-earths and their Hydrates to dry Carbon dioxide, Scheibler, 

 478. — Synthesis of active Conine, Ladenburg: Identity of Cadaverine with 

 Pentamethylenediamene, Ladenburg. 479. —Method of obtaining Hydrochloric 

 acid absolutely free from Arsenic, 480. — Fluorescence: Instantaneous Photog- 

 raphy, M. Marey: A Potential strengthener for measurements, Hallwachs: 

 Compressibility and Surface Tension of Liquids, W. C. Rontgen and J. Schnei- 

 der: Observations on pure Ice and Snow, T. Andrews, 481. 



Geology and Natural History. — Gaseous constituents of Meteorites, Ansdell and 

 Dewar, 482 — Recent discovery of Emeralds and Hiddenite iu North Carolina, 

 W. E. Hidden, 483. — Mineral Physiology and Physiography. T. Sterry Hunt, 

 484 — Index der Krystallformen der Mineralien, Victor Goldschmidt, 485.— 

 Botanical Notes: Lamarck's Herbarium, etc.. 485 — Absorption of coloring 

 matters by the living protoplasm of vegetable cells, 486. 



Miscellaneous Scientific Intelligence. — The Astronomical Journal: National Acad- 

 emy of Sciences; 486. — Catalogue of the Collection of Minerals of A. Dohrmann, 

 487. Obituary. — Charles Whittlesey, 487. 



Index to Yolume XXXII, 488. 



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