234 Scientific Intelligence. [Serr. 
blient jamais le modéle qu’il leur laisse, et que, prés de son tombeau, 
en se promettant de limiter, ils réjouissent encore son ombre. 
Et nous mémes, mes chers collégues, au milieu des Jarmes que nous 
arrache une perte si douleureuse, cherchons quelques consolations dans 
ces souvenirs; disons nous bien; quel homme jouir ici bas d'un bon- 
heur plus constant ? quel homme fut jamais plus certain d’un bonheur 
éternel ? 
I. Volcano in Iceland. 
According to the last but imperfect news from Iceland, the voleano 
in Eyafields-jokull had remained quiet until the 26th of June, when a 
new eruption of ashes took place, which seems to have done more harm 
than the former. It is reported that the foot of the mountain had 
burst, and that a current of lava had begun to flow. The inhabitants 
of the nearest villages have been obliged to leave their houses. On the 
north part of the island frequent earthquakes have been felt, but they 
were not violent, and have done little damage. 
Ill. Jeffersonile. 
A new mineral, to which the above name is given, has been disco- 
vered at the Franklin Iron Works, by MM. Vanuxem and Keating, 
about six miles to the north-east of the town of Sparta, in Sussex 
County, New Jersey. 
The following description of this mineral is given by the last- 
named gentleman: 
“‘ This mineral has hitherto been found in Jamellar masses, the largest 
of which does not exceed a pigeon’s egg, imbedded in Franklinite and 
Garnet. 
“It presents three distinct cleavages, two of which are considerably 
easier than the third. These cleavages lead us for a primitive form to 
a rhomboidal prism, with a base slightly inclined. The angles of the 
prism are 106° and 74°, those of the inclination of the base are 94° 45’ 
and 85° 15!.. There is another face, which makes with the vertical face 
of the prism, angles of 110° and 70°. I have likewise seen, in one 
instance, cleavages parallel to a rhomboidal prism of 116° and 64°. I 
have also obtained cleavages under an angle of about 99° 45! and 
80° 15'. I have not been able to trace the connexion between these 
and the former, but I am inclined to think, that they result from the 
combination of the two prisms just mentioned. I had hoped, as some 
of the cleavages have a tolerable degree of lustre, to have been enabled 
to determine the angles by the reflecting goniometer, but all my. 
attempts to that effect have proved unsuccessful. Ihave not been able 
to obtain a reflection from any one face. 
“ The hardness of this mineral is intermediate between that of fluor 
spar and apatite. It is very readily scratched by pyroxene (malacolite). 
“Its specific gravity varies from 3°51 to 345. I have in one 
instance obtained it as high as 3-64, but I suspect the mineral to have 
been mixed with Franklinite. 
“¢ Its colour is dark olive-green, passing into brown. 
“¢ It is slightly translucent upon the edges. 
“ Its lustre is slight, but semi-metallic upon the faces of cleavage ; in 
the transverse fracture, it is resinous. 
‘“‘ The fracture is lamellar when in the direction of cleavage, other- 
wise it is uneven. 
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