iv CONTENTS. 



PAGE 



X. Contributions to American Botany. By Sereno Watson 9(j 



XI. On the Heat produced in Iron and Steel by Reversals of 

 Magnetization. By John Trowbridge and Walter 

 N. Hill 197 



XII. On the Heat produced in Iron and Steel by Reversals of 

 Mdc/netization. By John Trowbridge and Charles 

 Bingham Penrose 205 



XIII. Influence of Magnetism upon Thermal Conductivity. By 



John Trowbridge and Charles Bingham Penrose 210 



XIV. Papers on Thermo- Electricity. — No. I. By John Trow- 



bridge and Charles Bingham Penrose .... 214 



XV. The Electromotive Foi-ce of Alloys. By John Trowbridge 



and E. K. Stevens 221 



XVI. The Potential of a Shell bounded by Confocal Ellipsoidal 



Surfaces. By Frank Nelson Cole 226 



XVII. Researches on the Complex Inorganic Acids. Hypophospho- 



Moly.lates. By Wolcott Gibbs, M.U 232 



XVIII. The Volumetric Determination of Combined Nitrous Acid. 



By Leonard P. Kinnicutt and John U. Nef . . 275 



XIX. The ^ Phemjltribrompropionic Acid. By Leonard P. 



Kinnicutt and George M. Palmer 277 



XX. On the Crystalline Form of Chlordibromacryllc Acid. By 



Oliver W. Huntington, Assistant 282 



XXI. On a Method of Determining the Index Error of a Meridian 



Circle. By William A. Rogers 284 



XXII. Studies in Metrology. First Paper. By William A. 



Rogers 287 



XXIII. On the Reduction of different Star Catalogues to a Common 



System. By William A. Rogers 399 



