282 



MR. T. HEELIS ON OCEAN SWELL. 



Skip ' City of Pekin ' (continued) 



Date. 



Ship's 



position. 



Nature and direction 

 of swell. 



Eemarks. 



1862. 











Aug. I. 



13 14 S. 



9 10 W. 



Swell during day from 

 S.E. and E.S.E. In the 

 evening long, and heavy 

 from S, 





„ 8. 



2 51 



19 20 



Heavy swell, rolling up 

 from S. 



Wind S.E. 



„ 9- 



55 



21 



Swell from S.S.W. to S.S.E. 



Do. do. 



„ 10. 

 „ II. 

 „ 12. 

 „ 13- 



I 15 N. 



3 12 



4 57 

 6 9 



22 38 



24 18 



25 45 



26 17 



(10-12 feet). 

 Southerly swell (10 feet). 

 Southerly swell ( 1 6- 1 8 ft.) 

 Southerly swell (16 feet) 

 Heavy swell from S.S.E. 



Do. do. 



Light airs and calm. 



„ 14- 

 „ 15- 



5 41 



6 19 



25 43 



S.S.-easterly swell and 



ripples, 

 liow swell from S. 



Calm and light airs from 



N.W. 

 Calms. 





In tlie above Table will be found instances of swells 

 arising from prevalent or straight-lined winds^ as tbe mon- 

 soons and trades, of those caused by currents, and of those 

 thrown off by the passage of cyclones. 



The swell from the southward and S.S.E. experienced 

 in the Indian Ocean, in the region of the S.E. Trades, 

 is at first sight rather puzzling. 



The true explanation of the causes of these seems to 

 be, that in the region of the S.E. Trades in that ocean, 

 although the great mass of water is carried by the action 

 of the prevailing winds towards the N.W., yet there exist 

 from time to time currents running to the southward. 

 No such currents are laid down upon any of our current- 

 maps, yet I am persuaded that they exist in nature. An 

 instance of this is afforded by the log of the ship ' City of 

 Pekin,^ on her outward passage to Calcutta, in the spring 

 of the year 1862, from which the following notes are ex- 

 tracted : — 



1 2th March. 



35 47 S. 



79 



10 E. 



Current South 27' 



15th „ 



28 22 



81 



13 



„ South 27' 



1 6th „ 



26 42 



81 



45 



,, South 23' 



17th „ 



23 38 



83 



10 



„ S. 50^ E. 42' 



