XXXIV-^ . ADVERTISEMEiiT. 



ror, which has fervedthem as a foundation to con- 

 clude that the rays of the Moon had no heat ; 

 whereas the contrary has been proved both at Rome 

 and at Paris,, by Profeffors of Phyfics. The pen- 

 dulum lengthens by heat, and contracts by cold. It 

 is very difficult to counterbalance it's variations, by 

 an: affemblage of rods of different metals. On the 

 Gthcr hand, it is very eafy for men, prejudiced 

 firomi infancy by zha dodtrine of attradion, to make 

 a miflake of fome lines in favour of it. Befides, 

 all thefe petty methods of Phyfics, fubjeâ: to fo 

 many mifreckonings, can in no refpeâ: whatever 

 contradiâ: the elongation of the Poles of the Earth, 

 of which Nature exhibits the fame refults on the 

 eheSea, in the Air, and in the Heavens. 



The elongation of the Poles being demonftrated., 

 the Current of the Stras and of the tides follows as 

 a natural confequence. Many perfons obferving 

 a co-incidence, between our tides, and the phafes 

 of the Moon, of the lame increafes and diminu- 

 tions, have concluded as certain, that this lumi- 

 nary, by means of her attraction, is the firft mov- 

 ing principle of thofc phenomena : but thefe co- 

 incidences exift only in one part of the Atlantic 

 Gcean. They proceed, not from the attraction of 

 the Moon adingupon the Seas, but from her heat, 

 reflefted from the Sun on' the polar ices, the effu- 

 fions of which llie increafes,. conformably to cer- 

 tain 



