270 _ Scientific Intelligence. 
The following are the ate dimensions which we have found for 
different parts of the Ge 
Diameter of the bate” or res on the edges, from north m 
to south, . 
Diameter of the basin or cup, ina 4 perpendicular direction, 18°00 
Diameter of the central well, 3°00 
Depth of the well, including ‘that of the basin :— 
1. In the direction of the first diameter, : ‘ 23°50 
2. In the direction of the second eee 3 : ; 21-50 
mh of the ae n the centre ; . 1:57 © 
ook care, i he ry to ier the order of our ther- 
isp "tbat their Be sole might be checked, I shall indicate by 
numbers and By the letter B, those of M. Bunsen, and by the letter D, 
thee which b 
will be Oe, that the temperature at the surface of the water 
hich fills the basin, must be excessively variable ; for that temperature 
depends at the same time on the temperature of the sides of the basin, 
on that of the air, on the force and direction of the wind, and on the 
the basin, agree 80 little;. we ourselves made a series of, obeg by BUGS 
the terms of which differ whnlasnls among Rides They a 
as follow 
Temperature at the margin. 
3d July, at 10 30 a.m.; basin filled, . 86:0 centigrade. 
* 1058 a.m. 5 bs ‘ 3 89-0 * 
oa Mak F Oa. 5 . i 3 88:0 
Sd? S208 QF pun. 3 ” 3 ; 89-7 mss 
ft 20°) 19 35-e.m: = “ , 760 * 
4th 6c “ce Tt l7 pe ; “cc * 85:0 oe 
Otle 405. SO eis; basis half fall, 2 82-5 in the wind. 
Rie 150 ve: ‘ 86-0 under the wind. 
We will admit that the mean inpetatne 6 of the water at the surface 
and in the centre of the basin is 85° C. 
he following table indicates the temperatures found in different 
points of the liquid column, immediately before a great eruption :— 
rd Experiment. | Fourth Experiment. 
The te Jy at 2h. 55m. in hse af-| me af 
ternoon: four hours before a great The 7th July, at 6h. 58m. in the afie ose 
Matic, Basin filled : ‘otal. dep, minutes before a great eruption. Bas’ filled : 
23-50; taoath ‘of the line, 22-85, total depth, 23"°50; length of the line, ra . 
dah rs ee ers a 
Heights. Heights. 
° m m 
Tua 4 22°85 850 44 
0, 1, F ‘2 | 1955 | Therm. No. 5, D eis 1 
Therm. No.2,B . . 1064 | 1475 | Therm.No.1,B . .  . 1100 | 1475 
ahi oe _ ote 1204 985 Therm. No.6,D . .  .. 1218 re: 
ere 3 or “iy . No, ‘ 
Therm. No.1,B . | 1275 al, rosso tg 2B ee M065 | 030, 
' Bottom. 
Mean gpg ll of = ela “ot, Mean temperature of the column of water, 
; 1099-19 
—_ Water, 1089°33. : 
