On the formation of hail in the spray of the Yosemite Fall. By William H. Brewer. [Substance of a paper read before the California Academy of Natural Science. April 19th, 1875.] ... [caption title]. N.p., n.d. Single sheet, 23 x 29.5 cm, folded to make 4 pages. Caption title. At head of title: "[From the American Journal of Science and Arts, Vol. X, Sept., 1875.]" Brewer, Galen Clark, and a "well-known mountaineer" (perhaps John Conway) observed the phenomenon at the base of the upper fall on April 14, 1874. Currey and Kruska 23. Small chip from upper fore-edge corner, several smaller chips along top edge, short split along spine fold, a good copy of a rare, fragile publication. (#168447).