DISCUSSION OF TIDES IN BOSTON IARBOR. 53 
TABLE XI—Showing the effect of the solar diurnal tide upon the height of low water for every hour of the moon's transit, and for 
the first of each month, expressed in hundredths of a foot. 
| 
HOURS OF MOON’S TRANSIT IN ASTRONOMICAL TIME. 
Month. - 7 - 
0 1 2 3 4 5 6 7 8 9 10) | 11 |/-12) | 135) 14) 15 | 16) 27 | 18 | 19) || 20 |) 21 ) 22) |) 23 
| | en ee ee eee 
dam..--. +11 |4+13 |+14 |4+14 |+13 |411 |+ 9 |+ 6 |+ 3 0 |— 4 |— 8 |--11 |—13 |—14 |—14 13 |\—11 |— 9 6 |— 3 O;+ 4/48 
HebEess= |} ) )) wie || hh) tO) 8 6 4 2 0 2 6 By 1) ghey ghey al) 8 6 4 2 0 2 6 
Mar. .--|+ 3 |+ 4 |4 5/+ 4|+ 3/4 3/4 2/41 0 1 3 /— 3 4 5/—5\—4/—3|— 3 —2/-1 0|+1)\+ 3 
April ...|— 2 |— 2 — 2 |— 2 |—- 2 — 2 2/—1 0 0 J+ 0 [+ 1 |+ 2 J+ 2 ]+ 2+ 2 }4+ 2/4 2)/4-2)4 1/41 0—1\—1 
May --- 6 8 9 9 8 6 5 3 il 0 2 5 8 9 9) 8 6 5 3 2 0 2 5 
dune.---| 10} 12) 13} 13) 12) 10 8 5 3 0 3 7} 10) 12} 13) 13] 12) 10 8 5 3 0 3 7 
July --- yl |) aly) ME) aE Sig} |) all 9 6 3 0 4 8 | 12) 135) Way Way) 1s) a 9 6 3 0 4 8 
Aug --- 8] 10; 11} 11) 10 6 4 2 0 2 6 jf a) Gh) bh |) ala) 8 6 4 2 0 2 6 
Sept esq 8 = S =o = 8 | —3|—3|—2 1 Oj 1/4 3/4 3/4 414+ 5/4 5)/4 4/4 3)4+ 3/42 )/41 Yt =8 
Oct .---. + 2/4 2\+ 2)/+ 2/4 2/4 2)+ 2/4 1/40 0 0 1j\—2 2\—2 2 2\—2 2\—-1\—-1 O jar ab ae a 
Nov 6 8 | 9 9) 6 5 3 1 0 2 5 6 8 9 9 8 6 5 3 2 0 2) 5 
WEG sss05 {710 +12 pris +13 |+12 |+10 |+ 8/+ 5 |4 3 0—3\|-7 f 10 j12 13 |—13 j-le } 10 |— 8 — 5 | 3 0 | 3 | 7 
Nore.—For lower transits the signs must be reversed. 
