The sign for sky, also heaven, is generally made by passing the index from east to west across the zenith. This curve is apparent in the Ojibwa pictograph Fig. 178, reported in Schoolcraft, I, pl. 18, Fig. 21, and is abbreviated in the Egyptian character with the same meaning, Fig. 179 (Champollion, Dict., p. 1).
A sign for cloud is as follows: (1) Both hands partially closed, palms facing and near each other, brought up to level with or slightly above, but in front of the head; (2) suddenly separated sidewise, describing a curve like a scallop; this scallop motion is repeated for "many clouds." (Cheyenne II.) The same conception is in the Moqui etchings, Figs. 180, 181, and 182 (Gilbert MS.)
The Ojibwa pictograph for cloud is more elaborate, Fig. 183, reported in Schoolcraft, I, pl. 58. It is composed of the sign for sky, to which that for clouds is added, the latter being reversed as compared with the Moqui etchings, and picturesquely hanging from the sky.
The gesture sign for rain is described and illustrated on page [344]. The pictograph, Fig. 184, reported as found in New Mexico by Lieutenant Simpson (Ex. Doc. No. 64, Thirty-first Congress, first session, 1850, pl. 9) is said to represent Montezuma's adjutants sounding a blast to him for rain. The small character inside the curve which represents the sky, corresponds with the gesturing hand. The Moqui etching (Gilbert MS.) for rain, i.e., a cloud from which the drops are falling, is given in Fig. 185.