RECORD AND REDUCTION OF THE TIDES. 



11 



Series I.— Tidal Observations from October 10, 1853, to December 28, 1853. 



Hourly observations on the pulley-gauge. Adopted reading of mean level 7.0, expressed in units 



of the scale. Increasing numbers indicate rise of water. 



November, 1853. 



Mean 

 solar 

 hour. 



3 



4 



5 



6 



7 



8 



9 

 10 



11 

 Noon 

 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 



11 



23d. 



Red. 



to 

 level. 



4.7 

 5.6 

 6.2 

 7.0 

 7.0 



7.5 



7.5 

 7.6 

 7.8 

 7.9 

 7.8 

 7.7 

 7.7 

 7.7 

 7.7 

 80 



8.6 



9.6 



10.4 



11.4 



11.8 



12.0 

 12.0 

 12.0 

 12.2 

 11.8 

 11.4 



10.0 



9.0 



8.2 



7.7 

 7.4 

 Midn't 7.2 



+0.4 



+0.2 



0.0 



—0.2 



—0.3 



—0.5 

 —0.6 

 —0.7 

 —0.8 

 —0.9 

 —0.9 

 —1.0 



a 



—l.i 



u 



—1.2 



—1.3 



—1.5 



—1.6 



—1.8 



—2.0 

 —2.1 



2.2 



—2^3 



—2.4 



—2.5 

 —2.6 



—2.7 



—2.8 

 —2.9 

 —3.0 



Ref. 

 obs. 



24th 



5.1 

 5.8 

 6.2 

 6.8 



6.7 



7.0 

 6.9 

 6.9 

 7.0 

 7.0 

 6.9 

 6.7 

 6.7 

 6.6 

 6.6 

 6.8 



7.3 



8.1 



8.8 



9.6 



9.8 

 9.9 

 9.8 

 9.7 

 9.9 

 9.4 

 9.0 



7.5 



6.4 



5.5 



49 

 4.5 

 4.2 



6.7 

 7.4 

 7.8 

 8.1 



9.1 



10.0 



10.5 



11.1 



11.6 

 11.9 

 12.5 

 11.6 

 11.0 



9.5 



9.0 



8.8 

 8.0 

 8.9 

 9.9 



10.3 



11.4 



12.6 



13.5 

 13.9 

 14.6 

 14.9 

 14.4 

 14.4 

 13.7 



12.8 



12.5 



11.5 

 10.11 



Red. 



to 

 level. 



Ref. 



obs. 



2oth. 



—3.0 

 —3.2 

 —3.3 

 —3.4 



—3.5 



—3.6 



—3.7 



—3.8 



—3.9 



" 

 —4.0 

 —4.1 

 —4.2 



—4.4 



—4.5 



U 



—4.6 



a 



—4.7 

 —4.8 

 —4.9 

 —5.0 



—5.1 



—5.2 

 —5.3 

 —5.4 

 —5.5 

 —5.6 

 —5.7 



—5.9 



—6.0 



—6.1 



—6.2 



3.7 

 4.2 

 4.5 

 4.7 



5.6 



6.4 



6.8 



7.3 



7.7 

 8.0 

 8.5 

 7.5 

 6.8 



5.1 



4.5 

 4.3 

 3.4 

 4.3 

 5.2 



5.5 



6.5 



7.6 



8.4 

 8.7 

 9.3 

 9.5 

 8.9 

 8.8 

 8.0 



6.9 



6.5 



5.4 



4.7 



10.0 

 10.2 



10.4 

 10.7 



11.2 



12.5 



13.6 



15.0 

 15.6 

 15.7 

 16.0 

 15.6 



15.2 



15.7 



16.0 



15.5 



15.5 

 15.4 

 15.2 

 15.8 



16.0 



16.4 



18.1 

 19.1 

 19.6 

 19.7 

 19.8 

 20.0 

 19.4 



18.5 



18.0 



16.0 



15.0 



Red. 



to 

 level. 



Ref. 

 obs. 



26th. 



—6.3 



—6.4 

 —6.5 



—6.6 



—6.7 



—6.9 



—7.0 



—7.1 

 —7.2 

 —7.3 



—7.4 



—7.6 



—7.8 



—8.0 

 —8.1 

 —8.2 

 —8.3 

 —8.4 



—8.6 



—9.0 

 —9.1 

 —9.3 

 —9.4 

 —9.5 

 —9.7 

 —9.8 



—9.9 



—10.0 



—10.1 



—10.3 



3.7 

 3.9 

 4.0 

 4.2 



4.6 



5.8 



6.7 



8.0 

 8.6 

 8.6 

 8.8 

 8.3 



7.8 



8.1 



8.2 



7.5 

 7.4 



7. 



6.9 



7.4 



Red. 



to 

 level. 



14.8 

 14.5 

 14.6 

 14.7 



15.2 



15.5 



16.5 



18.0 



19.4 



20.0 

 20.2 

 20.0 

 19.5 

 19.0 



17.8 



16.3 



15.7 

 15.4 

 15.1 



—10.3 

 10. 



10.4 



—10.5 



—10.6 



-10.7 



a 



-10.8 



(( 



a 

 u 



-10.7 



Ref. 



obs 



27th. 



—10.6 



Red. 



to 

 level. 



-10.5 



4.5 

 4.2 

 4.3 

 4.3 



4.7 



4.9 



5.9 



7.3 



8.7 



9.2 



9.4 

 9.2 

 8.7 

 8.3 



7.1 



5.6 



5.0 

 4.7 

 4.4 

 4.3 

 4.4 

 4.7 

 4.9 



6.4 



8.5 



9.4 

 9.9 

 9.9 

 9.9 

 9.9 

 9.6 

 9.3 



7.2 



—10.4 



14.7 



13.7 

 13.3 

 13.1 

 13.0 

 13.2 



16.0 



17.3 



19.8 



20.9 

 21.2 

 21.5 

 21.6 

 21.3 

 20.9 

 20.9 



19.2 



18.2 



17.1 



15.2 

 14.9 

 14.6 

 Ki.9 

 17.5 



19.3 



20.9 

 22.0 

 22.1 

 22.8 

 22.9 

 22.9 

 22.6 

 22.1 

 21.6 



Ref. 

 obs. 



28th, 



5.8 19.7 



-10.4 



—10.3 



-10.4 



-10.5 

 —10.6 



It 



—10.7 



It 



-10.8 



tt 



-10.9 



it 



—11.0 

 ci 



-11.1 

 -11.2 



a 



-11.3 

 -11.4 

 -11.5 



(( 



-11.6 



u 



-11.7 

 -11.8 

 -11.9 

 -12.0 



4.3 



3.3 



2.9 

 2.8 

 2.7 



2.S 



5.6 



6.9 



9.3 



10.3 

 10.6 

 10.8 

 10.9 

 10.5 

 10.1 

 10.0 



8.3 



7.2 



6.1 



4.1 



3.8 

 3.4 

 5.7 

 6.2 



7.9 



9.4 



10.5 

 10.5 

 11.2 



11.2 

 11.2 

 10.8 

 10.3 

 9.7 



7.7 



17.5 



15.3 

 14.9 

 14.7 

 14.5 

 14.5 

 14.8 

 15.6 



18.2 



20.3 



22.6 

 2:;> 

 24.5 

 24.7 

 24.8 

 24.3 

 23.8 



22.7 



21.4 



18.4 



17.1 

 15.8 

 IS. 7 

 15.6 

 15.9 

 16.4 

 17.7 



20.0 



22.0 



23.7 

 23.9 

 23.9 

 24.0 

 23.5 

 21.1 

 20.8 



Red. 



to 

 level. 



-12.0 

 -12.1 

 -12.2 



a 



-12.3 



tt 



-12.4 

 -12.5 

 -12.6 

 -12.7 



CI 



—12.8 



-12.9 



—13.0 



Ref. 

 obs. 



5.5 



3.2 

 2.8 

 2.5 

 2.3 

 2.2 

 2.5 

 3.2 



5.7 



7.7 



9.9 

 11.1 

 11.7 

 11.9 

 12.0 

 11.5 

 10.9 



9.8 



8.4 



5.4 



4.1 

 2.8 

 2.7 

 2.6 

 2.9 

 3.4 

 4.7 



7.0 



9.0 



10.7 

 10.9 

 10.9 

 11.0 

 12.5 

 8.1 

 7.8 



Nov. 26. From 11 A. M. of this day two readings are given for each half hour ; the mean of the two observa- 

 tions has been inserted above. The two corresponding readings agree generally within a few tenths, the differ- 

 ence being due to the effect of the small waves. 



Nov. 28. Orders were given to observe and record careful soundings by lead line at the tide hole every day 

 at twelve o'clock. 



