Tidal Investigations 



11b 



APPENDIX. 



DIGEST OF OBSERVATIONS OF 1914 AND 1915, AND SYNOPSIS OP RESULTS 



DEDUCED FROM THEM. 



CoLLiNSON POINT. North coast of Alaska. — The ranges given are the 

 mean of the four consecutive differences between high and low water, which give 

 the greatest or least averages at Springs and Neaps respectively. The time 

 was local; and though the time errors were not noted, it was approximately- 

 correct throughout. Values in brackets are from incomplete observations. 



Date. 

 1914. 



Tide. 



Range. 



Springs. Neaps 



Date. 

 1914. 



Moon. 



Moon's 

 Transit. 



Luni-tidal 

 intervaL 



Jan. 18. 



" 27. 

 Feb. 5. 



" 10. 



" 17. 



" 26. 

 Mar. 6. 



" 13. 



" 21. 



" 30. 

 April 4. 



" 10. 

 May 3. 



Mean. 



Neaps. . 

 Springs. 

 Neaps. . 

 Springs. 



Springs. 

 Neaps. . 

 Springs. 



Springs. 



Springs. 

 Neaps. . 



Feet. 

 0-62 



0-60 

 0-62 



0-65 

 0-58 



(0-55) 



0-60 



Feet. 

 0-37 



0-21 



019 



0-35 

 0-19 



0-26 



Jan. 24. 



" 25. 



" 26. 



" 26. 

 Feb. 9.. 



" 10, 



" 10. 

 Feb. 24., 



" 26. 

 Mar. 10. 



" 11. 



" 12. 



" 12. 



New. 



Full, 



New. 

 It 



Full.. 



Establishment. 



Lower. , 



Upper. 



Lower. 



Upper. , 



Lower. 



Upper , 



Lower. 



Upper . 



Lower. 



Upper. 



Lower. 



Upper. 



Lower. 



H. M. 



:46 

 0:34 

 :12 

 -12 

 :24 

 :04 

 :02 



0: 11 

 :47 

 :26 

 :21 

 0:06 



:18 



Martin point. North coast of Alaska. — Observations for three days 

 only, at Neap tides, March 19 to 21. Time not reliable, being carried from 

 CoUinson point and not checked on return. Observations being at Neaps, do 

 not give the Establishment. 



Neap range March 20, determined as before 0-29 foot. 



Demarcation point. At Alaska boundary. — Observations for four days, 

 at Spring tides. May 9 to 12. The range given is the mean of the four con- 

 secutive differences between high and low water, which give the greatest average 

 at the Springs. The time was carried from Collinson point, and checked on 

 return, after a month. It is thus quite reliable, and is reduced to Local time be 

 allowing for difference of longitude. 



