The subject can read from a prepared text such as the Rainbow Passage, count backward from 100, or recite a memorized poem or song. When the sunlight strikes raindrops in the air, they act like a prism and form a rainbow. The rainbow is a division of white light into many beautiful colors. These take the shape of a long round arch, with its path high above, and its two ends apparently beyond the horizon. There is, according to legend, a boiling pot of gold at one end.
People look, but no one ever finds it.
When a man looks for something beyond reach, his friends say he is looking for the pot of gold at the end of the rainbow. The test subject shall be questioned by the test conductor regarding the comfort of the respirator upon completion of the protocol. If it has become unacceptable, another model of respirator shall be tried. The respirators shall not be adjusted once the fit test exercises begin. Any adjustment voids the test, and the fit test must be repeated.