Content*. xi 



BY ALBERT R. LEEDS. 



Ozone and the Atmosphere, (Art. XX) 193 



Lines of Discovery in the History of Ozone, with an Index to its 



Literature, (Art. XXIX N 363 



The History of Antozone and Peroxide of Hydrogen, with an Index 



to the Literature of the latter, (Art. XXIX, Appendix) 405 



BY HENRY A. MOTT. JR. 



Testing the Value of Guns by Firing under Water, (Art. XVII) 1(54 



BY HENRY S. MUNROE. 



Prehistoric Bronze Bells from Japan, (Art. II) 35 



BY JOHN S. NEWBERRY. 



Descriptions of New Fossil Fishes from the Trias, (Art XI) 127 



Descriptions of New Palaeozoic Fishes, (Art, XIX^ 188 



BY G. JEWETT ROCKWELL. 



Index to the Literature of Vanadium, (Art. XIII) 133 



BY ISRAEL C. RUSSELL. 



On the Physical History of the Triassic Formation in New Jersey and 



the Connecticut Valley, (Art. XXI) 220 



A New Form of Compass-Clinometer, (Art, XXIV) 263 



BY ROBERT E. C. STEARNS. 



Description of a New Species or Variety of Land Snail from Califor- 

 nia, (Art. XXVI) 316 



