IXX EXPLANATION OF THE PLATES. 



merare precîfely oppofitc to thofe of Winter, as the Poles 

 themfelves from which they flow. 



I could fupport this new theory by a multitude of fafls, 

 and apply it to moft of the nautical phenomena which have 

 hitherto been deemed inexplicable ; but the time and the 

 fpace left me forbid it. It is fufficient for me to have de- 

 duced from it the principal movements of the Seas. I was 

 under the neceflity of tracing the windings of this labyrinth 

 with an application and labour of which the Reader can- 

 not eafily form an idea. I have fliewn him it's entrance 

 and outlet, and prefent him with the clew. He will be 

 able, undoubtedly, to go much farther without my affift- 

 ance. I can venture to aflTure him, that, by taking advan- 

 tage of thefe principles, in perufing journals and Sea voy- 

 ages, that pretend to any thing like exa6lnefs in dates and 

 obfervations, fuch as thofe of Abel Tafman, of Hugues, of 

 Linfehotten, of General Beatilieu, of Froger, of Frajer, of 

 Dampicr, of Ellis, See. he will find a new light difFufed over 

 thofe palfages of marine journals, which are, for the moil 

 • part, fo dry, and fo obfcure. 



Had time and means been granted me to unfold this part 

 of my fubjedl, and to difplay it in all the luminous fimpli- 

 city of which it is fufceptible, I have the vanity to think 

 that I could have rendered it, in many other refpe6ls, 

 highly intcrefting. I would have procured a reprefentation, 

 on two large folid globes, of the two general Currents of 

 the Ocean, in Winter and in Summer, with arrows which 

 fhould have cxprefied the exacl intervals between one tide 

 and another ; and of their counter-currents, lateral to the 

 pallagc of all flraits, which produce on different fhores the 



counter- 



