iv ' CONTENTS. 
Astronomy.—Astronomical ee comprising logarithms from 3 to 100 places, 79. 
Miscellaneous at Intelligence.—Probability of error in writing a series of num- 
bers, 79.—Record of Scien peepee Industry for 1875: Report of the British As- 
sociation for iene Setnents of Physical Geography: Transactions of oe Rip 
necticut ‘padang Vol. III, Part I, 80. Obitwary.—Angelin: E. Billin 
NUMBER LXVIIL 
' P: 
Art. X.—The Colorado Plateau Province as a Field for Geo- ns 
logical Study 3: by:-Gs Kz Gupert, <a ges gi cs 85 
XI.—N ote on the development and homologies of the anterior 
brain-mass with Sharks and Skates; by B. G. WitpErR,_ 103 
XIL—New form of Compensating Pendulum; ae ee Heo 6 
of the same ; od. Pots OM oe ee 7 
XIV.—On some of the ahangen’ in the Physical Properties of 
Steel, produced by Tempering; by A. S. Kimpatt,.---- 110 
XV. a Glass ani for the measurement of Angles; by L. M. 
ands ud Seen OV Sed os 112 
XVI. Baars Wilhelm August Argelander, .......-.--- 113 - 
XVIL—On Dinitroparadibrombenzols and their Derivatives ; | 
- cs AUSTEN, . 2c. . Si st) ee 118 | 
XVIIL—On a New Formation of Dinitroaniline, and some 
Reactions of Dinitrobrombenzol; by P. T. AvstE Mg scs Ss 
XIX.—On Southern New England during the melting of the 
Great Glacier, Appendix; by J. D. Dana, ._...--.---- 125 
XX.—The Greenstones of New Hampshire and their organic 
remains; by G. W. Hawes. With plate V, -----....: 129 
SCIENTIFIC INTELLIGENCE. . 
sics.—Constitution be Bl Lane WREDEN: Conversion of 
RLENM —Influe 
normal into ta eye acid, E: nee of Asparagin on 
charimetry, CHAMPION and PELLET: wATkaloid ‘Aricine ane some related bodies, 
ae) Analysis of Mixed Liquids, Siemens, 139.— of Salt-Solutions, 
Angewandte Krystallographie, ies A. SapEBECK: New Journal en ‘to 
Mineralogy and Crystallography, 15 
Botany and Zoology.—The Oaks of the Dita States, by Dr, G. ENGELMANN, 153. 
M. Gristave-Adolphe Thuret, Equisse Biographique, par M. = ah BORNET, 155.— 
Fragmenta Phytographie Australie, contulit Liber Baro Fr. DE M' 
Braziliensis, ed. Aue. Gum. EIcHLER: The Forest, Products of Michigan at the 
ie a a et 
