594 



SCIENTIFIC RESULTS OF ZIEGLER POLAR EXPEDITION 



The values of the harmonic component 2N in (73) and (74) must be estimated as about 

 0.133 Nj, which is o.oii feet for Cape Flora and 0.013 feet for Teplitz Bay, as this element was 

 not evaluated from the observations. The perigean and apogean ranges are then found to be 



Pn 

 An 



Cape Flora 



Ft. 



1. 103 



0.831 



Teplitz Bay 



Ft. 

 1.274 

 0.962 



75) 

 (76) 



SiMui,TANEous Tides 



The observations were simultaneous at Ca{)e Flora and TfepHtz Bay for 14 daySj from May 

 21 to June 3, 1904. The direct comparison of these stations during this period gives the 

 following results : 



(77) 



from which it appears that the tide at Teplitz Bay is about 3h 46m earlier than at Cape 

 Flora; the zero of the tide staff at Teplitz Bay is 1.725 feet above the zero of the staff at 

 Cape Flora, and the mean rise and fall, or range, of tides is o. 17 feet greater at Teplitz Bay than 

 at Cape Flora. 



Nearly the same difference in time of tide at these two stations is obtained from the mean 

 lunitidal intervals of (3) and (4), which makes Teplitz Bay about 3h 31m earlier than Cape 

 Flora. 



CoTiDAi< Hours 

 The cotidal lunar hour of a place may be found from the expression 



Cotidal hour = 0.483 (HWI + LWI ± 6.210) ± Z 



(78) 



in which L is the local longitude, positive for west and negative for east longitudes. The 

 upper or lower sign is to be used with 6.210 aCcotding to which sign will make I/WI approxi- 

 mately equal to HWI. Substituting in (78) the values given in (3) and (4), taking L = 

 — 3.332 hours for Cape Flora and L= — 3.866 hours for Teplitz Bay, we obtain : 



Cotidal hour 



Cape Flora Teplitz Bay 

 h h 



6.123 2.230 



(79) 



