138 U. S. COAST AND GEODETIC SURVEY 
OLPARTMENT OF COMMERCE 
U. S. COAST AND GEODETIC SURVET 
Form 2418 
Fey re TIDES : Comparison of Simultaneous Observations 
~_) @) station. DIC) 
Height i. Height ditference. 
(ee es =Mean difference in time of high and low water respectively. 
(Q)S0 0 =Correction for difference in longitude. (Table on back of form.) 
(3)=—____ | ______ =(1)++(2)=Mean difference in high and low water intervals, respectively. 
Feet. Feet. 
(C) eee =Mean HHW height at (A). (5) see =Mean HLW height at (A). 
(i) eee =Mean LHW height at (A). @)S See =Mean LLW height at (A). 
(8) Sa =(4)—(6)=2DIIQ at (A). (()) ci =(5)—(7)=2DLQ at (A). 
(10)==.....5..8-7.=3[(4)+(6)]=Mean MW height at (A). (11)=..--¢ »53_=3(5)+(7)]=Mean LW height at (A). 
(12)=.....4.-3.4.=(10) —(11)=Mn at (A). (13) =. 6&2.=3[(10)4+-(11)]=MTL at (A). 
(4) = eee =Mean HIIW difference. (Q5)=2e =Mean HLW difference. 
6) =Mean LHW difference. (i) eee =Mean LLW difference. 
(3)=2e- ees =(14)—(16)=2D1IQ difference. (QU) =(15)—(17)=2DLQ difference. 
(20) =.—4..04__==3[(14)-+(16)]=Mean IIW difference. (21)=..7.3- 714 =3[(15)+(17)]=Mean LW difference. 
(22)=.— 0.33._=(20)—(21)=Mn difference. (23) == 3. 9.0 —3[(20)4(21)]=MTL difference. 
(24)=_ 0.80 % —(19)+1(12) —(22)]=Mn ratio. (25)=_____=(8)+[(8) —(18)]=DI1Q ratio. 
(26)=__ =9)-+(9) -(19)]=D1.Q ratio. 
Results from compurisor of Stations A and B. fi IW. LWT. | MTL. 
Length of Sories- Sion Ilours. Feet. Feet. 
Accepted values for standard station, from if ri. Goo eh GR 194-2 Aer) epee atte G2. de Me: (eS eee 
123,90 | xo.202) * 
Differences and ratios: (3), (23), (24), (25), (26)--------- Res 
Corrected values for subordinate station___-__---.-.--.-_.-------------------------------- 
Mean LW on stafi at subordinate station=MTL—4Mn see 2 al...feet. 
Mean LLW on staff at subordinate station =MTL.— :Mu—DLQ= Aedes et eee ee feet. 
Co ted Sb yt Se eo es Ue Se Neca eect eee, AV OT CODY, = Meee trecac sae ea ccseeceneaceoneaceas y decks 35. oe ee ee % 
mputed by apes y (Date.) 
Fra. 56.—Comparison of simultaneous observations, diurnal tides. 
