128 Pro/. Cleaveland's descrijptlon of Halos and ParJielia, 



long^ slender prisms ; and in the latter^ of rounded grains. But 

 the remark of Muschenbroeck may here be repeated, who says 



r 



that nothing has been advanced, concerning the cause of Parhelia^ 

 more probable, than the hypothesis of Huyghens, except that fro- 

 zen cylinders or spicula are always found transparent^ and never 



opaque at the centre. 



Brunsivickf (Me.) dpril 15 



) 



1818. 



• 



