Note 101 — Chapter I · NATURE POWERS.
Reading edition
The short duration of the rain-bow is held to indicate an excessive fall of rain while its long duration forbodes a scarcity of rain.101 The appearance of the rain-bow on a river is supposed to indicate the approach of rain, while its appearance on a mountain means the departure of rain.102 Of the two bows of which the rain-bow seems to be composed, the larger is believed to belong to Ráma, and the smaller to Lakshman.103 Since the God Indra is supposed to send rain, the Indradhanushya (the rain-bow) is regarded as a sign of the advent of rain.104