76 Scientific Intelligence. [Juny, 
acids; and, in fact, to be a hydrate of magnesia constituted of the 
same proportions as the foliated variety, with about five per cent of 
protoxide of iron. In other veins of the Hoboken serpentine, and in 
that of Bare Hills, near Baltimore, a mineral also has been found, 
which has received the name of marmolite. Its texture is foliated 
with the laminz, thin, and often parallel as in diallage ; its colour pale 
green or greenish grey ; lustre pearly ; soft enough to be cut with a 
knife, and almost perfectly opaque and inflexible. Spec. Grav. 2°470. 
Jt was found on analysis to contain 
Narmesiax. £2 co a6 eonauia ...- 46:0 
SiltCeh e's soe oe eee Rew ae, Ringe i) oy 9, 
me ears alee de aitye Se Ne aime 4d U) 
WAtEI ic coc esis Sat lore ineehesiopeicars 15:0 
Iron and Chrome.............. O°5 
99°5 
ASSES s «is, ora Cand oleiel ote ete kareena 5 
100°0 
(Silliman’s Journal.) 
VI. Analysis of Sulphuret of Molybdenum, found near Chester, Delaware 
County, Pennsylvania. by Mr. Seybert of Philadelphia. 
In internal characters it resembled so closely that of Saxony as to 
render any description needless. It consisted of 
Sulphur..... aes A ohh. AC 39°68 
Molybdentm f. 5. sti tsicavis aetsle 59°42 
Boss Veh. ts os Melek wita we OOD: 
100°00 
(Ibid.) 
VII. Analysis of the Chromate of Iron from Bare Hills, near Baltimore. 
By the Same. 
Its constituent parts are, after roasting, 
Silex ati: 8 ewslate Remarc ie ; 10°596 
Peroxide of iron ........ vse. 36'°004 
ALUMNAE es tle toe. bots 13:002 
Protoxide of chrome............ 39-514 
99:116 
MOSS. ee oe wattsidealaveys; oatarede Meneses 
100:000 
(ibid.) 
VIIE. Progress of Mineralogy in America. 
~The volume of Professor Silliman’s Journal which has just been 
received, shows that this branch of science is becoming a favourite 
object of pursuit in America. It announces the discovery of some 
minerals not before found in that country, and of several new localities 
of the rarer minerals, such as beryl, chrysoberyl, chlorite, fluor spar, 
satin spar, epidote, yellow oxide of tungsten, both pulverulent .and 
