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VON TROIL’S LETTERS ON ICELAND. 607
aN? Lime: Height. Duration.
II] 15 we again heard feveral fubterraneous noifes, though not
fo {trong as before.
IV 43 the water flowed over very ftrongly during a whole minu
49 we again heard many loud fubterraneous difcharges, 7
only near the {pring, but alfo from the neighbouring rid
of rocks, where the water {pouted.
rn VI gt — 92 — 4 00
After this great effort, the water funk down very low into the pipe, and was entirely
quiet during feveral minutes, but it foon began to bubble again; it was however not
thrown up into the air, but only to the top of the pipe.
N° Honrs. Min. N*® Hours. Min.
1 5 7 18 5 42
2. § Qt 19 W557 482
315 252% SOx 2005 5st ay
4 § 13: 21 Sia 01482
Bl lbh. ode ZS 5. 49
6 5 17 23 5 30%
7 5 18F 24. 5 5it
8 5 205 25 5 54
Ny Ee ee OR de ati Sue
IO § 238 aS ik SO.
II 5 27% 28 6 19
12 5 303 29 6 19
eC Meee: Boge a On aay
143.5%. 333 Sea Oram oO
Joe re 823) Oe 12g
Ee vp aie woe, BB: . js Ory tag?
WZ siSist 3°
The force of the vapours which throw up this water is exceflive ; it not only prevents
the ftones which are thrown into the opening from finking, but even throws them up
to a very great height, together with the water. I muft not forget to mention a very
curious circumftance: when the bafon was full of water, we placed ourfelves before
the fun in fuch a manner, that we could fee our fhadows in the water, every one obferved
round the fhadow of his own head (though not round the heads of the others) a circle
of almoft the fame colours which compofe the rainbow, and round this another bright
circle: this moft probably proceeded from the vapours exhaling from the water. I re-
member to have feen fomething fimilar to it when travelling in the fummer, particularly
in the meadows, and it is fooneft obferved when riding on horfeback, or in a carriage,
when you have your fhadow on one fide.
Not far from this place, another fpring at the foot of the neighbouring ridge of rocks
fpouted water to the height of one or two yards each time.
N° Hours. Min. N° Hours. Min,
ee hye sae amy arin, OH °
2 3 47x = a 8 4 3
3 S 5°z fia ras 9 £ Sz
4 ° 53% — — 10 ° 8z
5, fo) 55 = — II ° liz
6 ° $73 _ _ 12 ° 14
VOL» Ie 4 U The
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