7(3 



Lord Rayleigh. on 



[May 15, 



included in the measurements ; in other respects the arrangements 

 were as before. 



Table II.— November 12. 



Pressure. Ware-length. s/ (Pressure.) 



262 401 40 



208 361 351 



182 34 33J 



158 31 31 



129 28J 28 



107* . 251* 251* 



86 221 23 



69 20 201 • 



56 18 181 



42 15 16 



34 131 141 



27 12^ 13 



21 . . 10 Ill 



In this case the law is fully verified, the discrepancies being de- 

 cidedly within the limits of experimental error. 



On the other hand, the discrepancies may be exaggerated by the 

 use of higher pressures. Table III relates to the same orifice *f as 

 Table I. Instead of the stoneware bottle, a tall wooden box was used 

 as reservoir. 



Table III.— December 20. 

 Pressure. Wave-length. «>/ (Pressure). 



757 200 155 



672 184 145 



587 171 136 



497 152 125 



442 141 118 



365 123 107 



289 106 95£ 



234 93 86 



189 79 77 



154 70 70 



123 62 ........ 62 



107 58 58 



89* 53* 53* 



74 48 48 



61 441 44 



The wave-lengths at the high pressures very greatly exceed those 

 calculated from the lower pressures according to the law applicable to 

 small vibrations. 



f Its condition may have changed a little in the interval. 



