﻿Vlll CONTENTS. 



NUMBER CXCII. 



Page 



Art. XLVIII. — 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 



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



by C. Barus and V. 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 4gS 



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, Paterno 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. Maret: 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 in 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. 



ERRATA. 



p. 77, 11 1. from top, for California read Greenland. 

 Page 78, 23 1. from foot, for Henman read Herman. 



