INDEX. 



Ixv 



the magnetic rotation of the plane of 

 polarisation of light in liquids. Part 

 I. Carbon bisulphide and water, 234. 



Whet ham (W. C. D.) on the velocities 

 of the ions, 182. 



Williamson (W. C.) and D. H. Scott, 

 further observations on the organisa- 

 tion of the fossil plants of the coal- 

 measures. Part III. Lyginodendron 

 and Heterangium, 195. 



Wilson (E.) and J. Hopkinson, alter- 

 nate current dynamo-electric ma- 

 chines, 89. 



Wilson (W. E.) on the effect of pressure 

 of the surrounding gas on the tem- 

 perature of the crater of an electric 

 arc light. Preliminary notes of 

 observations made at Daramona, 

 Streete, co. Westmeath, 174. 



and P. L. Gray, on the tempera- 

 ture of the carbons of the electric arc, 

 with a note on the temperature of 

 the sun. Experiments made at 

 Daramona, Streete, co. Westmeath, 

 24. 



ERRATA. 

 VOL. LVII. 



On page 369, in the figure, for the right-hand letter B, read E. 

 On page 370, for ~Eg read HC. 



ABEO AD'HE. 



DQ BC. 

 F ff KC. 



> EF HK. 



VOL. LVIII. 



Page 239, line 18 from bottom, for ether read absolute alcohol. 



END OF FIFTY-EIGHTS VOLUME. 



HARBISON AMU tiUJia, FK1HT1K8 IN OBDIKABT TO HKU MAJK8TX, 8T. MAKTlJf'B LAKE. 



