52 DISCUSSION OF TIDES IN BOSTON HARBOR. 
Tapie VIII—Showing the effect of the solar diurnal tide upon the time of high water for every hour of the moon’s transit, and 
for the first of each month, expressed in tenths of a minute. 
| HOURS OF MOON’S TRANSIT IN ASTRONOMICAL TIME. 
Mouth. | 7 , 
0 1 2 3 4 5 6 7 8 9 10 11 12) || 13) 14 15 | 16 17 18 19D 20M ee 22 | 23 
OftiNecses +13 |414 +15 |4+15 |4+15 |414 |--13 |+11 |+ 6 0 |— 6 |—11 |—13 |—14 !|—15 |—15 |—15 |—14 |—13 |—11 |— 6 0 |+ 6 |+11 
mebeee-- 10 20) 2) 12 12 12 10 8 4 0 4 8 10 12) 12 12 125 | 2 10 8 5 0 5 8 
Mar +4]+5/+5)/4+ 5)/+ 5/4 5/+ 4/+ 3 |4 2 0|\—2\|—3'—4|/—5 5 5|—5 5) 4 3/— 2 0/4 2\+3 
Apres —2}-3\-3|-3-3—3|-2)-2-1 (0) fe al ee) fae Oy IES} jak Sy [ise By EB} IE B} LE) eo} ee aT | @) al I 
May Heol eeLON | ON sen ee) 9 " 6 3 0 3 6 7 Qi W} iQ}) tO] io 9 7 4 0 4 7 
June. 12} 14 14 14 14 13 12) 10 5 0 oD |) 20 12 13 14 14 14 14 12 10 6 0 6 10 
July -- 13 15} 15 15 15; 15 14 bE} 0 6 11 14 15 15 15 15 | 15 13 li 6 0 |} abt 
Aug .-- 9 12 | 12 12 12 12 11 8 4 0 4 8| i1 12} 12) 12") 12 12 10 8 5 0 4 8 
Sept ----|— 5 1— 5 5 i 5 4 ay 0) 0/+ 2/4 3/4 4\)+5)/4+ 5/4+ 5/4 5\|4+ 5)/4+ 4/4 3 |4 2 0|/—2\—3 
Octi--=- £2|+ 3/4 3 3+ 3+ 3/4 2|4 2 ]+ 1 0/—1/—2 |— 2 |-— 3 — 3 |— 3 |— 3 — 3 |— 2 | 2 — 1 0 |+ 1/+ 2 
INOW == 9) 10 10 10 10 10 8 6 3 0 3 6 8 10 10 10 10 10 9 7 4 0 4 7 
Dece---4 +12 14 j+l4 14 |+14 [+13 |+12 |+10 |+ 5 0 |— 5 |—10 |—12 |—13 —14 |—14 |—14 ;13 —12 |—10 oa 6} 0Oj|-+ 6 )+10 
Nore.—For lower transits the signs must be reversed. 
TABLE IX—Showing the effect of the solar diurnal tide upon the time of low water for every hour of the moows transit, and for 
the first of each month, expressed in tenths of a minute. 
HOURS OF MOON’S TRANSIT IN ASTRONOMICAL TIME. 
Month. | 
O | 2 Oy) 8 | 2) Be le |) Sh ih OY) seo fp stay) ey fp as) af Ss | at | ae |) te} |] |) Bo |) eh | Be || a 
shee a 
Janeeee |-13 |—11 |— 6 | 0 J+ G J4-41 [413 |414 J415 |415 |415 [494] 413 |411 |+ 6] 0 |—G |—11 |—13 |-14 |—15 |-15 |—15 |—14 
Uses) Ol Sy Ze |) i i) OI) ey) Ge ee a Ne) | A a) DI] a sea te |) a 
Mar....\—3|—3/—2) 0|]+2|/4+3/43/4+4/45/4+5/+5/45]/+4|/4+ 3/42] o| 2) 3/4} 5/-5|-5|_5|-4 
NyMilcete OEE OIE || OM) Wa pi gies pe aaa tl OTe OL Ok Sie Bike aide BLE @ 
Meyoccd) OF H] 8) OF Sl Bil ol ol sol lao} ol] el 7) Bi oO} Bl a) Ss] Oo} wm] tm] mm) 9 
SAUNT SN SO I at ey SEE SES SEN Sey SE SGI Gy) Syl RENE ae} ae} aN) aie) Tee) ai) 
| July -.--| iG} |) id Gi) O 6) WW) 13) 14] 15) 15] 15) 14) 13) 12 GQ) oO) Gl) si) wey) 2) a) aes) a) ae 
jAngeess! O) El 2) Ol 4) BY ON) re) sey ol) Oy Bl 2il Oi) 2) Bi) oi) co] ey ce) eI) a0 
| Sept.---|4: 31 3 [+ 2 | W) BB sh et 5 | 5/5) 5 4\|— 3 |—2 0|+ 2+ 3 Si al |e, Gy te Bye ay [tk |e, 
Oct .-.-— 2|— 2} -1 | OfF1)+ 2/2) 3 i+ 3) 3/43 35 8) |RE B) [26 P} |/6 a Qe te BiB BiH Hh. 8 |e B 
Worbere| Oy) eS Ol Bl 2h Ol Oil wl wl Ol ol ol ei] sl ws) al. ol) Ol a} aol) a! “s 
Meese: 12 | — 6] 0+ 6 |441 14-12 |419 |414 [424 |4a4 [413 |492 }420|4 5] 0}—5 |-10 |-12 [13 |-14 |-14 [14 [42 
Note.—For lower transits the signs must be reversed. 
Taste X—Showing the effect of the solar diurnal tide upon the height of high 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. | eT as ad 5 7 7 
OM || 2863 Nese oem as | EY |] aah fe) Yh) ee || as |) aes fae |) at | a) || atD |] ed |) 2. |) a 
| —6| 0]+ 7|+13 ris |422 [104 +04 |+o4 | +22 [418 [413/46] 0 |— 7 |-13 18 [92 [94 |_24 |_o4 |_92 
| 4] 0] 5] 10) 13} 36) 18] 19] 18) 16] 13) 10) 4) 0} 5] 10] 13) 16/ 18) 19] 18) 46 
I—2) O]+ 2)4 4]4 6]4 7/4 8]+ 8l4 7/4 7]+ 644/42) ol el 4—6/-7/-8\—8|_7/-7 
| 1 rn ey Ly En) Ee Offi leo aie aie ole 5 i+ 4 l+ 4 
May .--.| 4| 0 a GQ) |) 2) es |) | Te) ae) 2 OI A) BN Te ae es | aes) |) a) 
June....| 16] 11] 5); 0] 6] 12] 16] 20] 22] 293] 22] a1) 16/ 1) 5] 0] 6| 12] 16] 20] 22] 23] 22] 
dilysse-e| 18) |) 13) 96") 0 7| 13| 18| 22| 24] 24| 24] 22| 18| 13| 6/ o| 7| 13| 18| 22] 24| 24] 23| 2 
Aug....| 13] 10/ 4]: 0] 5| 10| 13| 16| 18| 19] 18] 16] 13] 10/ 4] ©] 5| 10] 13] 16] 18] 19] 18] 46 
Sept [pr © ie teas eee Os a ah 8 ae Os 2+ 4 le 6+ Ti+ BI el T+ 7 
Oe sce S821] OF Ape seal cle slp aie ale si], 211) oH tee 445i 5/4 4 
Nov HW) 8a) os a) on) a | a) |) 5) 13 | mi) a) 2 Of 2) oi) me tay ws) a) 1a 1 
Dec j-16 [11 |— 5 | 0 f+ 6 +92 416 | 420 [+92 | p23 | 422 | 421 |416 [411 45] 0 —6 L492 |46 20 |-92 |-23 |—22 |—a1 
