PROFESSOR KELLAND ON THE THEORY OF WAVES. 545 



^ ^ (32.2) 12 (12.3032) (.78297) 

 " ~ .928703 



(32.2) (12.3032) (.782 97) 

 inieet c^- 12 (.928703) 



c = 5.275 

 remarkably near the truth. 



These results, however, are of considerable importance, from the circum- 

 stance that they all err in defect ; and it appears that the error is nearly of the 

 same magnitude in all, as compared with the whole space, viz. about one-eighth. 

 Whether this can be accounted for by any slight error in the formulse, or in the 

 value of \, I leave it to subsequent investigations to determine. 



Edinburgh, March 12. 1839. 



VOL. XIV. PART II. 5 B 



