Chemistry and Physics. 109 
tetragonoids over, the crystalline form o , as AB, 
ade to depend upon a plane equator, having 7 sides 
as a vertical axis ere is here an apparent approximation to 
the views of Pro na. But neither these views nor 
h 
has already acknowledged Mr. H.’s ape of publication. 
E 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
1, Note by J. D. Dana.—In the last volume of this Journal, 
Mg, Ba, Fe, ete., to the Na, Li, K, etc. The species of the same group 
are to be compared with one another, and not those of different 
grou 3 
Bases Silica Non-alk. Alk. 
CurysoLire Grour.—Chrysolite, ete. ee all non-alk. 
Leucophanite Los “ae 44: 1 
PuENacite GRourp.— Phenacite, ete. ete all non-alk. 
. Meliphanite z 1t Bole 
Ermpore GRovp.— Epidote see all non-alk. 
: Zoisite Ret all non-alk. 
Saussurite 2.2) if eck 
Jadeite EAs 2 pee 
Mica Grovup.— Astrophyllite Bed 1 
Phlogopite Ge Sy 1 
Biotite tc ok | 
Lepidomelane | ae 1 
scovite 3 Bees ge © pee 
Lepidolite bes 3S 3.39 
ophyllite ia ie | 
ScaPouire Grovp.— Sarcolite bit 
: Meioni bed 
Paranthite eae 
Bre es hd 
ebel : 
i + 46g to 
