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, 

 397^104, 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, Difference in, of 

 Titanium XX 3900 and 3913 in 

 Arc and Spark, 351, 528. 



Wave-Lengths, very Short, The Ab- 

 sorption of the Air for Light of, 



Webster, A. G., Absolute Measure- 

 ments of Sound, 544. 



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

 Wilson, J. H. 



W T rede, 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. 



