STUDY X. 



55 



the magnet ? Thus prepared, or in fome other 

 way adapted to it's nature, it might pofïibly indi- 

 cate the places which contain mines of that rich 

 metal. Perhaps it might determine the general 

 points of direction to the Eaft or to the Well, 

 which might ferve as an indication of the Longir 

 tudes, more fteadily than the variations of the 

 magnetic needle. 



If there be a point at the Pole, on which the 

 Globe feems to revolve, there may, polTibly, be 

 one under the Equator, from which it's rotatory 

 motion has commenced, and which may have de- 

 termined it's motion of rotation. It is very re- 

 markable, for example, that all feas are filled with 

 univalve fhell-fifh, of an infinity of very different 

 fpecies, which all have their furrounding fpirals, 

 in an increafing progreffion, and in one and the 

 fame direction, that is, from left to right, like the 

 motion of the Globe, when the mouth of the fhell 

 is turned northward, with the bafe to the ground. 

 There is only a very fmall number of fpecies which 

 may be conlidered as exceptions, and which have, 

 for this very reafon, been denominated unique 

 (lingular, or extraordinary). The fpirals of thefe 

 circulate from right to left, 



A direction fo general, and exceptions fo parti- 

 cular: in univalve fhell-filh, undoubtedly have 



e 4 their 



