| Experiments on the refrangibility of the invisible rays of the Sun. |
| It corresponds in refrangibility with the yellow band of the spectrum. |
| It was simply so lowered in refrangibility as to escape the visual range. |
| Here, by the interposition of the platinum foil, the refrangibility of the ultra-red rays is so exalted as to render them visible. |
| As the angle of incidence is increased, the reflected light becomes brighter and rises in refrangibility. |
| This is an illustration of what is called the aberration of refrangibility. |
