41 8 INDEX. 



P. 



Problems, physical, involving differential equations, approximate arithmetical solution by finite differences (RicHABD- 

 SON), 807. 



E. 



RicnABDSON (L. F.). The Approximate Arithmetical Solution by Finite Differences of Physical Problems involving 

 Differential Equations, with an Application to the Stresses in a Masonry Dam, 307. 



S. 



Scandium, part II (CnoOKEs), 359. 

 SEWELL (C. J. T.). The Extinction of Sound in a Viscous Atmosphere by Small Obstacles of Cylindrical and Spherical 



Form, 239. 



Sound, extinction of, in viscous atmosphere by small obstacles (SEWELL), 239. 



Specific heats of air and carbon dioxide at atmospheric pressure by continuous electric method (SwrANN), 199. 

 Spectral scries, critical study of alkalies H and He (IIiCKs), 57. 



Standards of length, wave-length comparator for, and wave-length rulings on (TuiTOJf), 1. 

 SWANN (W. F. G.). On the Specific Heats of Air and Carbon Dioxide at Atmospheric Pressure by the Continuous Electric 



Mel hod at 20" C. and 100 C., 199. 



T. 



TOTTON (A. K. II.). A Wave-length Comparator for Standards of Length : An Instrument for Fine Measurement in Wave- 

 lengths of Light. With an Appendix on the Use of Wave-length Rulings as Defining Lines on Standards of Length, 1. 



W. 



WALKEK (G. W.). The Initial Accelerated Motion of Electrified Systems of Finite Extent, and the Reaction produced by 



the Resulting Radiation, 145. 

 Wave-length comparator for standards of length (TUTTON), 1. 



H AND SONS, PBINTEBS IN OBDINABY TO HIS MAJESTY, ST. MABTXN's LAKB, LONDOK, W.C. 



if- 





