325 



other. The triangular form, shown in the figure in the text, 

 probably belongs to the same class. Figs. 2, 5, and 6, in 

 pi. xvi., represent a related series, passing from simple bead- 

 like prominences, as in fig. 2, to the long and attenuated 

 spines seen in fig. 6, between which there were many grada- 

 tions ; and the three figures, included in the text, show a 

 similar development in the direction of few but coarse spines. 



4. Agglutinated Forms. — These comprised the largest 

 examples of the hailstones, and many of this class assumed 

 most remarkable shapes. Among the various forms noticed 

 were : — 



(a) Flask-shaped : a sphere containing a nucleus which 

 had the appearance of the smooth and spherical examples, 

 described as No. 1 variety, surrounded by clear ice, with a 





*%>i 







4 



h 



"Size and shape of hailstones which fell at Millswood 

 between 10 and 11 a.m. on Saturday last. Each one 

 weighed just £ oz. and measured l£ in. across after having 

 been brought in from lawn to warm room." This block, 

 with descriptions, which is reproduced from The Mail of 

 May 19, 1917, was published from original drawings sent 

 by an observer. 



long and solid neck of uniform thickness, extending from one 

 side of the main body (pi. xvi., fig. 3). 



(b) Elongated : consisted of a main body that was 

 cylindrical or fusiform in outline, showing on the surface 

 a mosaic pattern, and at either end knob-like extensions that 

 proceeded from the cylindrical portion (pi. xvi., fig. 7). 

 The septation, in this class of hailstone, seems to suggest a 



