

614 . Lord Kelvin on Deep- Water Two-dimensional a 
shed off on the two sides, travelling away from it rightwards 
and leftwards with accelerated velocities, each remaining for 
ever convex. Jhus we see the beginnings of two endless 
processions of waves travelling outwards in the two directions; 
originating as infinitesimal wavelets shed off on the two sides 
of the middle line. Hach crest and each hollow travels with 
increasing velocity. Hach wave-length, from crest to crest, 
or from hollow to hollow, becomes longer and longer as it 
advances outwards ; all this according to law fully expressed 
in (8) of § 3 above. . 
§ 7. Here is now the table of numbers promised in $95 
above ; it practically defines the forms and magnitudes of 
the two and a half wavelets, between =0 and #=2, which 
the space-curve for t=5 (figs. 2 and 3) fails to show. 
) 2) ee ae 
P=; hats G4: pi sin (24 @)e er 
a ———— — 
















Col. 1, |, Col: 2.'| Col. 3. Col. 4 i Col. 5 Col. 6. Col. 7. 
= g z & r — fe blr: . 
a. lee ere algae mee 
a eRe gate F ee 
ee ay ee ao ere 
Ss .o. ae = 
| | | 
0 14142 | 1:0000 1°4142 1:0000 | 10-10-1357 |-+10—10-1965 
"O05 14140 ‘9997 14140 | "3434 | ) ie (LATA eee ‘OTLT 
064 ans aw ue 0 ue 0 ; 
10 1410 ‘9987 1:409 | eed » ‘L778 |-- 10-10-1891 
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20 1401 "9952 1:393 |= 0032 |); ,,0 3082 irae "0016 
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oa oe Ab fs Tess Aaah 7 0 
. ‘40 1362 9820 1338 — 5451) ,, 4366 |\—=10-Me23 
‘60 1°309 9638 |... 1-262 \— 23841 ; 08 Saae 31°84 
632 ee a ee O pie es 
‘0 | 1249 | -9487/ 1179> © -7598) 10-5 -02396|+ 10-5 -0297 
1:00 1:190 9239 | 1:099 | SBO62 lo 5, 4¢29na nee 3152 
1:25 1:118 ‘9015 1:007 . 6831 33. 0D" (Eis 4-424 
1:50 1°053 ‘8817 “9287 | 4928 » | 40°68 | 99 99 23°67 
ah deh ae ot EPS CALE MAG: S17 HAG 2) OE ae 
1-75 9961 | -8651 ‘8616 |— 6832 ,, 2125 ,—10-5 1446 
2°00 9456 8506 8045 — :9007 | la. See ae 801:9 
2:50 8612 | °8243 7142 |— :1633 703180} ,, ,, 447°3 
2-54 ae Fh —~ 0 Le 0 
3°00 "7952 8113 6451 8296 ‘08210 0542 
3°50 ‘T7411 ‘7980 ‘DOLT | 9473 ThkG | -1064 
| 

