INDEX SLIP *i>here. 



fit/ Low? RAYLEIOH, O.M., F.K.S. 



II "itli an Appendix, yii'iny f/i*' 



ir.t f .,: 



KA YLKIOH, (Lord). On the Aroustio Shadow of a Sphere, with au Appendix 

 giving the Values of Legendre's Functions from P,, to P.,, at Intervals 

 of 5 Degrees, by Prof. A. Lodge. 



Phil. Tran., A, vol. 203, 1904, pp. 87-110. 



Leeendre's Functions Approximate form when n is large. 



RATLEIGH, (Lord). Phil. Trans., A, vol. 208, 1904, pp. 87-110. 



Hhado vr, Acoustic, of a S phew. 



RATLBIGH, (Lord), Phil. Trans., A, vol. 203, 1904, pp. 87-110. 



source of sound of a rigid sphejv 



The question turns upon tliM .-Lttivc inn-iii 1 

 radius (c) of tlie sphei-i-. 1C > 

 lui but littlt; ett""CT lit 



The following bthli- 

 .somewhat larger sjihc 



motions from P to P 00 

 LODGE. 



904. 



Lissed the effect upon a 

 source. 



'ave-length (X) and the 

 e presence of the sphere 

 nee. 

 > principal directions of 



-f- G' represents the intensitx of s 



M'OHS such that ft is the cosine n1 



'Ugh the source. Up< 



<J ' 11 values of /A, when i 



The 



more than doubled when kc = '2. 

 (362.) 



In looking al 



stance from the sphere 

 ?n them and that radius 

 rneasureineJit adopted, 

 hen the propagation is 

 H = 1 show that the 

 direction being already 

 ires, the first point which 

 0.3.04 



