f clouds.

[38] No conception can be formed of this picture from the engraving.
It is perhaps the most marvellous piece of execution and of gray
color existing, except perhaps the drawing presently to be noticed,
Land's End. Nothing else can be set beside it, even of Turner's own
works--much less of any other man's.

[39] I know no effect more strikingly characteristic of the
departure of a storm than the _smoking_ of the mountain torrents.
The exhausted air is so thirsty of moisture, that every jet of spray
is seized upon by it, and converted into vapor as it springs; and
this vapor rises so densely from the surface of the stream as to
give it the exact appearance of boiling water. I have seen the whole
course of the Arve at Chamonix one line of dense cloud, dissipating
as soon as it had risen ten or twelve feet from the surface, but
entirely concealing the water from an observer placed above it.

[40] Note especially the dark uppermost outline of the mass.

[41] In the possession of B. G. Windus, Esq. of Tottenham.

[42] I have often seen the white thin, morning cloud, edged with the
seven colors of the prism. I am not aware of the cause of this
phenomenon, for it takes place not when we stand with our backs to
the sun, but in clouds near the sun itself, irregularly and over
indefinite spaces, sometimes taking place in the body of the cloud.
The colors are distinct and vivid, but have a kind of metallic
lustre upon them.

[43] Lake Lucerne.

[44] St. Maurice (Rogers's Italy).

[45] Vignette, the Great St. Bernard.

[46] Vignette of the Andes.

[47] St. Michael's Mount--England series.

[48] Illustration to the Antiquary. Goldeau, a recent drawing of the
highest order.

[49] Vignette to Campbell's Last Man.

[50] Caerlaverock.

[51] St. Denis.

[52] Alps at Daybreak (Rogers's Poems:) Delphi, and various
vignettes.

CHAPTER V.

EFFECTS OF LIGHT RENDERED BY MODERN ART.

Sec. 1. Reasons for merely at present naming, without examining the
particular effects of light rendered by Turner.

Sec. 2. Hopes of the author for assistance in the future investigation of
them.

I have before given my reasons (Sect. II. Chap. III.) for not wishing at
present to enter upon the discussion of particular effects of light. Not
only