Lines cut the Arc will show at what distances from the center, or Point of contact, each Colour is reflected.
The thickness of colour'd Plates and Particles of
| Air. | Water. | Glass. | ||
|---|---|---|---|---|
| Their Colours of the first Order, | Very black | 1/2 | 3/8 | 10/31 |
| Black | 1 | 3/4 | 20/31 | |
| Beginning of Black | 2 | 1-1/2 | 1-2/7 | |
| Blue | 2-2/5 | 1-4/5 | 1-11/22 | |
| White | 5-1/4 | 3-7/8 | 3-2/5 | |
| Yellow | 7-1/9 | 5-1/3 | 4-3/5 | |
| Orange | 8 | 6 | 5-1/6 | |
| Red | 9 | 6-3/4 | 5-4/5 | |
| Of the second order, | Violet | 11-1/6 | 8-3/8 | 7-1/5 |
| Indigo | 12-5/6 | 9-5/8 | 8-2/11 | |
| Blue | 14 | 10-1/2 | 9 | |
| Green | 15-1/8 | 11-2/3 | 9-5/7 | |
| Yellow | 16-2/7 | 12-1/5 | 10-2/5 | |
| Orange | 17-2/9 | 13 | 11-1/9 | |
| Bright red | 18-1/3 | 13-3/4 | 11-5/6 | |
| Scarlet | 19-2/3 | 14-3/4 | 12-2/3 | |
| Of the third Order, | Indigo | 22-1/10 | 16-4/7 | 14-1/4 |
| Blue | 23-2/5 | 17-11/20 | 15-1/10 | |
| Green | 25-1/5 | 18-9/10 | 16-1/4 | |
| Yellow | 27-1/7 | 20-1/3 | 17-1/2 | |
| Red | 29 | 21-3/4 | 18-5/7 | |
| Bluish red | 32 | 24 | 20-2/3 | |
| Of the fourth Order, | Green | 35-2/7 | 26-1/2 | 22-3/4 |
| Yellowish green | 36 | 27 | 23-2/9 | |
| Red | 40-1/3 | 30-1/4 | 26 | |
| Of the fifth Order, | Greenish blue | 46 | 34-1/2 | 29-2/3 |
| Red | 52-1/2 | 39-3/8 | 34 | |
| Of the sixth Order, | Greenish blue | 58-3/4 | 44 | 38 |
| Red | 65 | 48-3/4 | 42 | |
| Of the seventh Order, | Greenish blue | 71 | 53-1/4 | 45-4/5 |
| Ruddy White | 77 | 57-3/4 | 49-2/3 |