XiV TABLE OF CONTENTS. 
PAGE 
Summary of Meteorological Observations at the Cooper Union, for 
the Month of February, 1873 (March 17, 1878)..........,...... 8 (40) 
Summary of Meteorological Observations at Cooper Union, for the 
Months of March and April, 1873 (May 5, 1878)................ 19 (51 
Meteorology of the Months of September, October, and November 
(December 22, 1873)......... asd Sveie afeste) sieva.ayavavbcep levee oth ie teterareeeeiete 85 
Meteorology of the Three Winter Months (April 6, 1874)............ 128 
Meteorology of the Month of March (April 27, 1874).,.............. 141 
Meteorology of the Three Spring Months (June 1, 1874)......... ... 153 
J. S. NEWBERRY. ‘ 
The Salina GroupiGdanuary, 20> U8i3)seces . sce ses ele cieelie okie ames 11 
Coals and Lignites of the Western States and Territories Ohne 
BA ST BRD) cdpieelevetes ee ire ood ice. v coon o eta nia rica oeit o eS esicieva tetas 9 (41) 
Remarks Reviewing the History of the Class of Fishes, as traced in 
the Older Rocks of North America (May 19, 1873) ........... 25 (57) 
The Life, Labors and Scientific Services of Prof. Louis Agassiz (De- 
cember 15,1878) eee wis swciscise wise sisteic Seis levels oyeratels ehallctelanen eae 85 
On Circles of Deposition in Secondary Sedimentary Rocks, Ameri- 
can’and Foreign’ (March 16; 1874). 2. se os sec cc ee eels of weston . 122 
On the Structure and Origin of the Great Lakes (April 20th, 1874).. 136 
On Dinichthys Terrelli (May 25, 1874).......... Meal: svekoresd Gasecs Ste eretetete 150 
HENRY NEWTON. | ‘ 
American Iron Ores Suitable for the Manufacture of Steel (January 
VOUS TAs HLS Sica Sie dee vo recctiocayemeaede ister aietereiaete tele asd evan eielorae rate ey Woe 
ADOLPH OTT. 
Recent Improvements in the Manufacture of Artificial Stone (title) 
(Mare 2, 1873) e sisecnsa., ospsies eee es tssis;0's's\> ct eer mee eee 7 (89) 
PIERRE DE P, RICKETTS. 
Assays of Iron Ores (December 8, 1873).... ..... 5 sta te chase 6 eae 82 
Results of some Experiments upon Cremation (April 15, 1874)...... 130 
R. P. STEVENS, 
On the Fossils found in the ‘ Flag-stones”’ used in the Cities of New 
Vork/and Brooklyn\ (March, 873) jeecciare alelelersl-(o'-1 (+1) leet 5 (37) 
Recent Observations on Drift (October 27, 1873)....... ........-0-- 71 
Irregularities in the Floor of the Coal Measures of Fastern Kentucky 
(October'27; 1873): ces feet. ieee elcisieercte aie’ vais a: letslee’s) siekoreronars 72 
J. J. STEVENSON. 
The Lignites of Colorado (January 19, 1874)....... Biss! fs, atone; sieltohnraiate 93 
