Meteorological observations and essays / By John Dalton.

  • John Dalton
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Meteorological observations and essays / By John Dalton. Source: Wellcome Collection.

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    day. I have seen it in great perfection at Low- wood Inn, near Winandermere Lake. A thick fog has concealed the lake at 6 A.M. ; by and by the lake became visible, next the opposite bank ap- peared, then the summit of the high ground beyond the lake; in time the base of Coniston Fell was seen, and the cloud gradually ascended the moun- tain, or more properly appeared to ascend it, till it rose-above the summit, and soon after vanished into air. On the whole [ think it must appear that a mountainous country is the fittest of all for study- ing the nature of clouds, though perhaps a plain country may be more advantageous for ascertaining the force and direction of the winds, and some other phenomena of meteorology. Note [B] SEE pace 45. Since the year 1791, I do not remember an in- stance of a thunder crack so remarkable as the one which occurred at the time to which this note refers. The cause of the long continued and irregular sound of thunder formerly appeared to me difficult to be accounted for ; and all the attempts I had seen to give an explanation of the phenomena utterly inadequate. The most common account of the continuance of the sound refers to the echo of the electric explosion occasioned by the ground, the mountains, the clouds, &c. which is almost destitute of plausibility.