404 ©. A. Young—Phetograph of a Solar Prominence. 
This monster, a foot in circumference, did not entirely melt 
away for six hours after it fell! The ice in all the hail-stones 
was peculiarly hard and compact. Interesting structural pecu- 
liarities were noted. Hail-stones of stellar form were always 
around which the alternate layers were arranged in spiral con- 
bo 9" diam. 
volutions, (fig. 4). The most common form was in concentric 
ayers, like the coats of an onion, still alternating opaque and 
transparent ; but the edges were finely serrated, like the stripes 
in some species of agate, (fig. 5). In one hailstone I counted 
thirteen of these layers, indicating that it had passed through 
as many strata of snowy and vaporous cloud. 
After a lull in the storm, for half an hour, there was a second 
fall of hail, but much lighter than the first. 
The d e done by such a war of the elements cannot 
easily be ascertained. Vegetation suffered greatly. In some 
cases men and animals were wounded. The icy missles not 
only broke thousands of pains of.glass, but also in many in- 
stances the window-blinds and sash. In a few cases weather- 
worn house-roofs were pierced. 
Peoria, IL, July 25, 1870. 
—————— 
Arr. XLV.—Photograph of a Solar Prominence; by Prof. 0. A. 
Youne, of Dartmouth College. 
ia following is from a letter to the editors dated Sept. 28th, 
_I have just succeeded, with the help of our skillful artist Mr. 
H. O. Bly, in obtaining a photograph of one of the solar sie 
mences, a copy of which I enclose. It was taken through the 
