Oldal 179 [179]
Absorption of light, selective, 66,
$3, 100, note.
Aitken, Dr. John, on the colour
of water, 82.
Avebury, Lord, on the colour of
water, 85.
Bidwell, Dr. Shelford, on " after¬
images,” 108, note.
Blackness of deep water, 67.
Channel, English, 77, 102.
Church, Prof. A. H., on the mix¬
ture of colours, ror, note.
Cloud reflexions in rippled water,
47, 48, 104.
Cloud shadows, 78, 104, 107, IIo.
Colour of water, apparent. See
‘“* Local colour.”
Colour of pure water, 67, note,
83, 86.
Colour of water, greenish: due to
vegetable stain, 67, note, 85, 86,
88; to mineral impregnations,
87; to colour of bottom or of
suspended particles, 67, 83, 97,
103.
Colour of deep water, purplish,
96.
water, 82, 99, 106,
Colours, complementary, ror,
note. ,
Contrast, effects of, 107, 110.
Cornwall, 102.
| Currents causing differences of
colour, 90, 102.
Curve, caustic, 62, note; harmonic,
or curve of sines, 31, note.
Davy, Sir Humphry, on the col¬
our of water, 85.
Depth of water, apparent, 62, |
|
note.
Engadine lakes, 69, 94.
Forel, experiments on colour of
water, 85.
Glass, coloured, experiments with,
66, 73, 79¬
Glass, greased, reflexion of candle
flame in, 41.
Horizon, 98.
Horizontal lines of image, dis¬
| appearance of, in rippled water,
44, 48, 52.
Ice, colour of, 69, note, 88.
. Ice, reflexions in rough, 50,
I