TO ASSIST WORK ON THE TIDES. 239 
TaBLE I.—M, Process. 
A B 
M aa Nl 
T=10(M-1)T=10(M-1)| ys = T=10(M-1))\T=10(M-1), = 
N=10 N=30 M N=10 N=30 M 
1 022 005 005 “005 213 027 027 ‘027 
2 009 070 075 038 —'099 — ‘069 —042 | —:021 
3 —'015 061 136 045 —‘031 —'081 —123 | —:041 
4 "217 095 231 058 —‘079 — 094 —.217 | —:054 
5 | —018 — ‘003 "228 045 —'133 027 —190 | —:038 
6 086 —'025 203 034 —'070 015 —'175 | -—:029 
7 | —-076 048 251 036 285 —090 | —°265 | —-038 
8 —"084 061 312 039 —'170 -'171 —'436 | —:054 
9 304 ‘073 “385 "043 — "384 —'179 —'615 | —:058 
10 | —°037 058 443 “044 041 — 068 —*683 | —:068 
11 —‘051 —:007 +436 “040 = "373 —039 | —'722 | —-066 
12 262 | —‘C02 “434 036 129 001 —:721 | —:060 
13 | —'231 —'046 388 ‘030 126 —'004 —°725 | —:054 
14 | —:038 —"U54 334 024 —'251 —:006 —'731 | —:052 
15 131 — 054 +280 ‘019 114 —'054 | —'785 | —*052 
16 —°255 — = _ 112 — _ _ 
17 —-039 — — — —°388 — — — 
1 2 3 4 5 6 7 8 9 
Fig. 7.—M, Process. 
