D. L. Cosari on Remarkable Hailstones. 85 



form. They presented circles or ellipses formed of concentric 

 layers of ice of an opaque whiteness, alternating with transparent 

 layers, in the centre of which there was a white or opaque nu- 

 cleus. The diameter of these plates of ice was from \\ inch 

 to 4 inches. 



(3.) There were also observed, other pieces of transparent ice, 

 whose surface was rough, and the edge of which, thicker than 

 the rest, formed a kind of border. The edge alone presented 

 striae, produced from three to five alternate plates of ice, some- 

 times whitish opaque, and sometimes transparent. The centre 

 of the exterior portion was a whitish circle, which appeared the 

 nucleus. The transparent centres of these pieces were sometimes 

 perforated, so as to present, after partial melting, the appearance 

 of a ring of ice, the diameter of which varied from 1| inch to 

 3 inches. Many individuals were struck with the appearance 

 which we have just mentioned. 



Hailstones of a Spherical Form. 



(4.) Some of these fragments presented a covering of trans- 

 parent ice, with an opaque and whitish interior. When these 

 were cut into two parts, there was found underneath the cover- 

 ing, whitish opaque layers, alternating with transparent ones ; 

 either disposed irregularly, or following the direction of radii. 

 The transparent layers were much smaller than the white opaque 

 ones ; so much so, that at first view they seemed to be entirely 

 whitish, and without striae. The diameter of this variety of 

 fragments was from 1 to 3 inches. 



(5.) The fifth species of fragments which were noticed, ap- 

 proached very nearly to the spherical form. Externally they 

 were smooth, and composed of alternating layers of opaque white 

 and transparent ice, with a whitish nucleus. 



It was remarked that the number of layers in the fragments 

 whose diameter did not exceed an inch and a half, was never 

 greater than nine, nor less than seven, without including the 

 nucleus. The exterior layer was always transparent, and thicker 

 than the interior transparent layers. 



The number of striae in the fragments whose diameter was less 

 than an inch, was from three to five, without including the 



