INDEX 
283 
Schlieren-Methode for photographing 
air disturbances, 180, 236, 258, 263. 
Scollay Square Theatre, Boston, 188. 
Shape of room, effect of, on reverbera¬ 
tion, 136, 139. 
Sounding-boards, 132. 
Steinert Hall, Boston, 17. 
Stokes, Sir George C., On the Effect of 
Wind on the Intensity of Sound, 121, 
122. 
Surface effects, 101. 
Swan, C. M., 132. 
Swartwout, Edgerton, 273. 
Symphony Hall, Boston, 60, 64, 65, 
225. 
Temperature, effect of, on reverberation, 
124. 
Theatre acoustics, 163. 
Tile, use of, as absorbent, 208. 
Toepler-Boys-Folev method of photo¬ 
graphing air-disturbances (Schlieren- 
Methode), 180, 236, 258, 263 
Transmission of sound, 216, 243; longi¬ 
tudinal, 243; transverse, 243; table 
of coefficients, 250. 
Tyndall, John, 128. 
Union Theological Seminary, Chapel, 
148. 
U. S. Military Academy, Chapel, 208. 
University Hall, Harvard, Dean’s room. 
29,32; Clerk’s room, 29, 32; commit¬ 
tee room, 28, 32; Faculty room, 30, 
32; Recorder’s office, 28, 32. 
Vases, resonant, 192. 
Ventilation, effect of, on reverberation. 
117. 
Viscosity of air, effect of, on reverbera¬ 
tion, 54. 
Vitruvius, 163. 
Wheelwright and Haven, 72. 
Whispering galleries, 255. 
Wien, M., 277. 
W’ires, stretched, 132. 
W'undt, W., 278.