INDEX. 



755 



Vector-Diagrams of Oscillating-Cur- 



rent Circuits, 371, 686. 

 Verein fur Naturkunde, Cassel, Letter 



from, 725. 

 Volcanic Action, The Nature of, 726. 



von Waltenhofen Phenomenon in 

 Finely Divided Cores, the Effects 

 of Sudden Changes in the Induc- 

 tances of Electric Circuits as Il- 

 lustrative of the absence of Mag- 

 netic Lag and of the, 539. 



von Waltenhofen Effect in Soft Iron 

 Rings, On the, 735. 



Warren, C. H., and Palache, C, The 

 Pegmatites of the Riebeckite- 

 Aegirite Granite of Quincy, 

 Mass.; their Minerals, Structure, 

 and Origin, 686. 



Warren (CM.) Committee, Report of, 

 730. 



Warren (C. M.) Fund, 727; Appropri- 

 ations from the Income of, 

 733, 



Water, A Method for Determining 

 Heat of Evaporation as Applied 

 to, 509. 



Williams, Samuel, Observations of a 

 Solar Eclipse, October 27, 1780, 

 707. 



Willson, R. W., Determination of the 

 Altitudes of Aeroplanes, 720; The 

 First Research undertaken by the 

 Academy, 706. 



Whitman, C. O., Death of, 726. 



Winthrop, James, The Solar Eclipse 

 at Penobscot, October 27, 1780, 

 710. 



Zoological Laboratory of the Museum 

 of Comparative Zoology, Contri- 

 butions from, 65, 423. 



