Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . pine, three-quarters of an inch in length, had theappearance of a miniature icicle, with a sharp point, and thebroken bases of three other spines, no doubt broken by thefall, were present, the spines being exactly antipodal to each 325 other. The triangular form, shown in the figure in the text,probably belongs to the same class. Figs. 2, 5, and 6, inpi. xvi., represent a related series, passing from simple bead-like prominences, as in fig. 2, to the long and attenuatedspines seen in fig. 6, bet
Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . pine, three-quarters of an inch in length, had theappearance of a miniature icicle, with a sharp point, and thebroken bases of three other spines, no doubt broken by thefall, were present, the spines being exactly antipodal to each 325 other. The triangular form, shown in the figure in the text,probably belongs to the same class. Figs. 2, 5, and 6, inpi. xvi., represent a related series, passing from simple bead-like prominences, as in fig. 2, to the long and attenuatedspines seen in fig. 6, between which there were many grada-tions ; and the three figures, included in the text, show asimilar development in the direction of few but coarse spines. 4. Agglutinated Forms.—These comprised the largestexamples of the hailstones, and many of this class assumedmost remarkable shapes. Among the various forms noticedwere: — (a) Flask-shaped: a sphere containing a nucleus whichliad the appearance of the smooth and spherical examples,described as No. 1 variety, surrounded by clear ice, with a. ^Size and shape of hailstones which fell at Millswoodbetween 10 and 11 on Saturday last. Each oneweighed just \ oz. and measured 1^ in. across after havingbeen brought in from lawn to warm room. This block,with descriptions, which is reproduced from The Mail ofMay 19, 1917, was publiiShed from original drawings sentby an observer, long and solid neck of uniform thickness, extending from oneside of the main body (pi. xvi., fig. 3). (h) Elongated: consisted of a main body that wascylindrical or fusiform in outline, showing on the surfacea mosaic pattern, and at either end knob-like extensions thatproceeded from the cylindrical portion (pi. xvi., fig. 7).The septation, in this class of hailstone, seems to suggest a 326 composite origin of agglutinated hailstones. Some examplesof this shape were fully 2 inches in length. (c) Irregular in outline: some of this type appeared tohave been
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