INDEX. 



585 



Torsional Forces, The Damping of the 

 Quick Oscillations of a Twisted 

 Fibre by the Resistance of the 

 Air and by the, 533. 



Transition Temperature of Manga- 

 nous Chloride; A New Fixed 

 Point in Thermometry, 341. 



Treasurer, Report of, 535. 



Trowbridge, John, Longitudinal Mag- 

 netic Field and the Cathode Rays, 

 397-404, 530 ; Positive Rays, 

 511-517, 544. 



Urine, The Determination of Arsenic 

 in, 325. 



Upsala, Sweden, The Linnaean Cele- 

 bration at, 529. 



Vespa maculata Linn., Maturation 

 Stages in the Spermatogenesis 

 of. 69. 



Vogel, H. C, Death of. 528. 



Volcanoes of the Aleutian Islands, 

 532. 



Volcanoes of the Azores, 529. 



Walker, W. H., elected Resident 

 Fellow, 528; accepts Fellow- 

 ship, 528. 



Warren, C. H., elected Resident 

 Fellow, 544. 



Warren (C. M.) Committee, Report 

 of, 539. 



Warren (C. M.) Fund, 536; Appro- 

 priation from the Income of, 

 542. 



Warren, Minton, Death of, 529. 



Wave-Lengths, Diiference in, of 

 Titanium X\ 3900 and 3913 in 

 Arc and Spark, 351, 528. 



Wave-Lengths, very Short, The Ab- 

 sorption of the Air for Light of, 

 528. 



Webster, A. G., Absolute Measure- 

 ments of Sound, 544. 



Wilson, J. H. See Baxter, G. P., and 

 Wilson, J. H. 



Wrede, Franz. See Richards, T. W., 

 and Wrede, Franz. 



Young, C. A., Death of, 530. 



Zoological Laboratory of the Museum 

 of Comparative Zoology at Har- 

 vard College, E. L. Mark, 

 Director, Contributions from, 69, 

 413. 



