[ i83 ] 



cryftalize in the diredion in which they were Jeaft impeded by the 

 rotatory motion of the globe, namely in that which extends 

 from North to South, and principally and moft perfedly in the 

 parts leaft agitated by that motion, namely thofe next the centre. 



3d. That this cryflalization like that of falts might have taken 

 place in one or more feparatey^oo//, or as we may here call them, 

 immenfe feparate malfes, each having its poles diftinfl from thofe 

 of the other, thofe in the fame diredion repulfive of and diftant 

 from each other. 



In confequence then of the univerfal law of attra<5tion of the 

 particles of matter to each other, thefe internal magnets exert 

 a double power of attraction ; the firfl and moft general, on the 

 particles of all bodies indifcriminately in proportion to their 

 denfity, and the dired or inverfe ratio of the fquares of their 

 diftances according as thofe bodies are found within or without 

 the earth's furface ; and the fecond, on bodies of their own 

 fpecies in proportion to their homogenity, and to the corref- 

 pondence of the arrangement of their integrant particles with 

 that of the integrant particles of thefe internal magnets. 



A MAGJSiET therefore is a mafs of iron, or of iron ore, whofe 

 oxygenation docs not exceed 20 per cent, or thereabouts, whofe 

 particles are arranged in a diredion fimilar to that of the great 

 internal central magnets of the globe. This I call the magnetic 

 arrangement. 



The 



