62 



U. S. COAST .\ND GEODETIC SURVEY 



that the scale readings from the tide curve will be from Yz to I14 f^t 

 less than the corresponding staff readings. The scale reading selected 



DEPARTMENT OF COM 



£d. July. 19ZS 



TIDES: COMPARATIVE READiNC3S 



Station: ^Jt.Oyt'tCt^ , lA/OyQA^I/t^Cliv^wl^ 



Ports oj... lA/.c.yy?^ 



Oll.hti" 



TiitCautiNo. „.,.'5'6 



T^eAAtn^ ... 



. . Oh.tni. 



Stele 



1; ZH- 



ut H-l.' 31 ' .:... 



Timtmr,iJi,n... J.^O'lV.. i.nJ.../22 " .2 O ' 



TduhteJty ...CD. A.. Date. ^u^. I.ffr,.l 1 Z.^. 



Prilirtiintir!/ icali icUlnl cf Jclum lint I (> , O O . Irtl. 



IfZ? 



■r- 



3 14 00 ig.qo 



12.^0 Q. feO £ ^r^A ^.t ^.y^a /^^ ha^ :s t. IUmS 



Ji-liL 



o a 11 .7.5 ir .hn n.h.') U. 



^ 



^ 



J3 



1. -^.q 



■'T If no l'^.(,Q i^.^f) n.io H yrj.fyiyy, ^.Iie^,y^^jL. 



O.ln.'i 



l^nlyfivnA/v^anA^ jootjinnq I <r, QJ}_ 





S 1.1 



)/-> i'^.pn 



^.Z.n o . - . ' i. to 



.S.*? I 8- H-S 



7 ;? . 3 n - .^ . g 5 



to tid^ /ofe 



yfe.fe5 





J-Ji. 



■?g Ig-T.S 



ZZ 20- 31^ 



y lU 7f lg. t>.-5 



;'-2.fao-3.q5 H J' 



oiu^cAiervl. 



? M 



■??< i/^fao ;<?. ?v> -.3. ^o 



ota-TZt/ wv Jfe.feZ 



/o If S)? I4.g5 ;g. fer) - S-TS 



II Mr. nti, I f .2 n . 1 0- 3 . 10 



17- II 



on i?,5.s 72. y-o-3.g-5 



iEI TjXiHf ZUrCCi l/tAntj ^Hfl/ta/^</- 



/3 q Sf ?0 I n ?^.oo -3.<TO 



J± 



n^a/y\r. 



It in Ty ;q.i.s ;^3.Q/>-3.g-5 £L 



7513- .yg <f,.Oo! 19. ff^ -3. go 



24l(? ^g /A.05 ;>0.<?0 J -3. ?5 £L 



Scale setting for ... ft<*n>.5". . to.,."^.x<y../ . 



Sum of differences ~..1i>.Z.5. 



Mean difference T7....3 .-g.J. 



Preliminary eettinn ] (a . O O 



Setting for reduction to tide , ^ , _ 



Etaff ..)Z.\5. 



Zl to rtW /5^ f 5 PZ.3S 



3. Tn 



2? ;i 



QQ. /? 2 5 : zz.^o 



- H.05 . F 



-1^ 



f/! Jg.q^l 22. g5 -3.9.5 t. 



3/ /I 



/^o' /9.00 ;'2 gpi- 3.5?0 tL. 



* In the nRumti headed "P)w>e of Twk" 

 Um Fonn lU ftxWbuhllns hi|h iml Urn. wmUr 



• •! ibc rour loOraint irnlioU: H. hr >ii|li waUr; L (or low > 



; R. for rwin« tide; ond F. for folliRt tide. 



Figure 23. — Form 455, comparative readings. 



for the comparison should be ruled across the glass scale on the 

 underside. 



208. The values in the fourth column of the form are obtained by 

 placing the scale on the record with the preliminary setting in coin- 

 cidence with the datum line and reading the height of the curve at 

 the point to which the corresponding staff reading refers. These 

 readings are to be taken to the nearest 0.05 foot. The difference 

 between staff and scale reading is to be entered in the fifth column, 



