1884.] 



struck at one-eighth of its Length. 



305 



Table of Harmonics. 



Similarly for the 3rd harmonic which had its theoretical node at 

 15 inches from the bridge, between a node of the 19th- at 14"21 inches 

 and one of the 20th at 15*75 inches, leaving 1'6'4 inches unoccupied 

 by nodes. Practically the 3rd harmonic spoke from 14*75 to 15'4 

 -inches from the bridge, giving a " play " of '65 inch, but would 

 not come out at 14' 7 or 15*45. These were the- only two cases in 

 which the amount of " play " was accurately determined. In each 

 case the harmonic came out brightest and best at the theoretical 

 node. Dr. Huggins said that he had remarked a similar phenomenon 

 on the violin, where he found a " play " of about at quarter of an inch 

 in "stopping" for the octave harmonic. Subsequently I brought out 

 the 23rd harmonic /""J + 28, vib. 3124'6, at T96 inches from the 

 bridge. And going nearer, at 1'50 inches from, and until quite up 

 to, the belly-bridge, I got out the dull prime note of the string C, 

 without apparently any partial. The same note was produced also 

 at 1'50 inches from the wrestplank-bridge. So that there is still 

 more play for the prime note itself. The stopping seemed to obliterate 

 all the upper partials, but allowed the string to vibrate as a simple 

 tone in its full length. It is remarkable how many harmonics could 

 be elicited by the means adopted from one length of string, and how 



2 B 2 



