| No. | Green Screen. | Blue Screen. | Violet Screen. | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Blk. | Or. | Red. | Blk. | Or. | Red. | Blk. | Or. | Yel. | |
| 1 | ·26 | ·69 | ·10 | 5·2 | 4·4 | 8·4 | 1·75 | 3·65 | ·40 |
| 2 | — | ·15 | ·03 | 6·0 | 3·8 | 6·7 | 1·7 | 3·9 | ·40 |
| 3 | ·22 | ·02 | ·04 | 5·6 | 5·9 | 6·5 | 1·5 | 3·5 | 1·2 |
| 4 | ·19 | ·05 | ·12 | 4·8 | 5·6 | 6·6 | 1·3 | 3·2 | — |
| Red. | |||||||||
| 5 | — | — | — | 4·0 | 10·5 | 2·0 | ·6 | 1·7 | 1·0 |
| 6 | — | — | — | 4·0 | 11·5 | 1·0 | ·5 | 1·9 | 1·1 |
BRIGHT SUNLIGHT (South), 18—9—12. 20 Minutes. | |||||||||
| Or. | Yel. | Or. | Red. | Or. | Red. | ||||
| 1 | 3·1 | 6·1 | 1·8 | 8·0 | 2·0 | 8·5 | 4·5 | 7·5 | 4·5 |
| Or. | |||||||||
| 2 | 1·9 | 3·7 | ·8 | 8·8 | ·6 | 3·6 | 5·0 | 6·5 | 4·5 |
| 3 | 1·0 | 7·0 | 1·6 | 8·6 | 1·4 | 3·5 | 4·0 | 8·5 | 4·5 |
| 4 | 1·8 | 4·8 | 1·2 | 8·0 | 2·2 | 6·8 | 4·5 | 7·5 | 4·5 |
| 5 | 1·7 | 4·9 | 1·4 | 7·6 | 2·4 | 8·0 | 4·0 | 8·5 | 4·0 |
| Red | |||||||||
| 6 | 1·8 | 3·4 | ·4 | 6·4 | 4·4 | 8·2 | 3·5 | 8·5 | 1·0 |
BRIGHT SUNLIGHT (South), 18—9—12. 30 Minutes. | |||||||||
| Or. | Yel. | Or. | Red. | Or. | Red. | ||||
| 1 | 1·0 | 6·8 | ·2 | 6·4 | 2·6 | 7·5 | 4·2 | 6·8 | 6·0 |
| 2 | 1·8 | 3·4 | ·2 | 8·4 | 8 | 3·8 | 5·4 | 8·1 | 1·0 |
| 3 | 2·2 | 5·2 | 2·2 | 8·0 | 2·0 | 7·5 | 4·5 | 8·5 | 4·0 |
| 4 | 2·5 | 4·7 | 2·0 | 8·0 | 1·6 | 7·4 | 3·7 | 10·3 | 1·0 |
| Yel. | |||||||||
| 5 | 1·6 | 4·2 | 2·8 | 7·6 | 2·6 | 6·8 | 3·1 | 9·4 | 1·5 |
| 6 | 1·5 | 3·9 | ·2 | 6·4 | 7·6 | 5·5 | 3·4 | 9·7 | 1·5 |
It would be unsafe to draw definite conclusions from a few experiments, but so far as permissible, the results show considerable differences, both in depth and in colour, of the energy of the different rays, for instance—
Compare Nos. 1 and 6 under 20 min. sunlight.
| Black. | Orange. | Red. | |||
| No. 1 | 10·6 | + | 1·4 | + | 5·0 |
| No. 6 | 6·2 | + | 4·6 | + | 7·7 |
or again 3 and 6, the maximum and minimum, under 30 min. exposure.
| Black. | Orange. | Red. | |||
| No. 3 | 10·8 | + | 1·2 | + | 1·5 |
| No. 6 | 6·6 | + | 7·9 | + | 5·0 |
The sensitiveness of Nos. 2, 4 and 5 appears to have been exhausted by 20 min. exposure to sunlight, further exposure showing no reaction; whilst the sensitiveness of Nos. 1, 3 and 6 do not appear to have been exhausted by 30 min. sunlight exposure.
Other noticeable points are the small action under the Orange, Green and Violet screens, and the greater, although variable proportion of colour to black under all the colour screens.