Pearson — On the Computation of Tides at Fleetwood. 181 



It may be of interest to place on record examples of the most 

 extreme cases of high, and low tides which I have as yet observed. 

 The tides in these instances were produced, of course, under circum- 

 stances least favourable and most favourable to their development. 





1876, March 19, Evening, 

 Anti-lunar and Anti-solar. 



1874, March ig, Evening, 

 Lunar and Solar. 



Moon's Transit, .... 

 Inc. for Lunar or Anti- lunar, 

 Moon's Hoiizontal Parallax, 

 Moon's Declination, . . . 

 Sun's DecUnation, . . . 



h. m. ft. in. 



18 8 20 



- 4 



54' 14" _ -12 



28° 44' N. fes - 19 



rs.K - 3 



h. m. ft. in. 



11 00 26 3 

 + 7 



61' 22"+ +27 

 0" 27' S. asc. + 14 

 0° +7 



ft. in. 



15 8 obs. 16 10 



ft. in. 



30 11 obs. 30 10 





(Helbre Island.) 





In the former case the tide fell fourteen inches below its expected 

 height ; but the barometer on this occasion stood at 30°-7', and the 

 wind was very cold and heavy from the jSTorth. Such a low tide had 

 not been remembered for at least twenty years. 



Annexed are comparisons for the month of September, 1878. 



Date. 



Calcula- 

 tion. 



Decrem. 



Observa- 

 tion. 



Increm. 



or 

 Decrem. 



Remarks. 



Barom., Wind, &c. 



1878. 



ft. 



in. 



in. 



Sept. 



12, 



25 



10 



+ 18 







27 



4 



- 15 





13, 



- 



- 



— 







26 



1 



+ 14 





14, 



27 



3 



- 18 







25 



9 



+ 9 





15, 



26 



6 



- 18 







25 







+ 6 





16, 



25 



6 



- 19 







23 



11 



+ 4 





17, 



24 



3 



- 18 







22 



9 









18, 



22 



9 



- 17 







21 



4 



4- 1 





19, 



21 



5 



- 14 







20 



3 



- 6 





20, 



19 



9 



- 11 







18 



10 



- 3 



ft. 



in. 



in. 



25 



9 



+ 9 



26 



6 



- 9 



25 



27 

 25 

 26 



26 11 



27 10 



25 

 25 

 24 

 24 

 22 

 22 

 21 

 19 

 18 



6 

 

 5 

 2 

 11 

 10 

 5 

 6 

 8 



+ 18 



- 18 

 + 9 

 + 5 

 + 11 



- 18 



- 6 



- 7 



- 3 



- 15 



- 1 



- 17 



- 23 



- 10 



- 3 



30-2 "W.X.W., half gale. 

 30-3 W.N.W., signal flying. 



30-4 

 30-1 

 30-0 

 29-9 

 29-4 

 29-5 

 29-8 

 29-9 

 29-8 

 29-7 

 29-7 

 29-8 

 29-9 

 30-1 

 30-4 



■W.N.W.jCalm. 

 W.S.W., calm. 

 W.S.W., calm. 

 S.W., fi-eshening. 

 S.W., equinoctial. 

 N.W., gale. 

 ISr.N.W., abating. 

 W.S.W., backing. 

 W.S.W., backing. 

 ISI'.W., strong. 

 W., strong. 

 "W., half gale. 

 W., unsettled. 

 W., gusty. 

 W., calm. 



P 2 



