| 
| Poreign Literature and Science. $85 
in the granite rock, about half a mile below the falls, 
which contains the Prehnite, small crystals of red feldspar are 
found, which, ‘ia colour, bear some resemblance to Rubelite. 
‘These red crystals have, undoubtedly, beer mistaken for the 
Rubelite. “Tourmalines, of any kind, ate rarely found’in the 
_ vecks of that region. 
5. Collection of Minerals——A gentleman, long conver- 
sant in the collecting of minerals, and well acquainted with 
ineralogy, will put up, arrange and describe scientifically, a 
cabinet, of from two to four thousand sp cimens, of both for- 
sion and American minerals. ecimens are stated to 
public institutions, as may be desired. For terms a : 
information, reference may be made to the editor of this Jour- 
nal. 
6. Double refraction —A correspondent remarks: ‘* Af 
ter a considerable number of experiments, with differen 
transparent bodies, I find none which do not multiply objects, 
* when cut and polished, with faces inclined to each other.— 
But, with the exception of Iceland spar, I have found no 
substance which exhibits double refraction, when the object is 
viewed through two opposite parallel faces. A notice of the 
experience of others in this respect, is requested.” 
Foreign Literature and Science—eriracted and translated 
by J, GRISCOM. 
op Eeyrr. The vice-roy has founded a college at Bou- 
lah, in the palace which was inhabited by his son Ismael.— 
One hundred pupils, from nine to thirty-five years of , are 
there maintained at his expense, and learn, under sk , as- 
ters, Chemistry, Mathematics, Drawing, Greek, Latin, Arabic, 
Turkish, Persian, and most of the languages of modern Ea- 
rope. It appears that the higher employments of the admin- 
istration are reserved for the young people who issue from 
this college, # ; Seta 
VOL. XI.—NO.- 2 
49 
