430 Report of the Progress of the Sciences ix France, 
opinion that the analogy between the organization of plants and 
animals becomes daily more evident, gives a sketch ef the me~ 
moir of M. Link on the structure of vegetables, which has been 
already given at length in the Philosophical Magazine. 
MINERALOGY: 
Cordier has made some researches respecting the stone calleé 
by some mineralogists water sapphire; and by some others blue 
quartz. It is brought from India, and particularly from Ceylon. 
Its gravity is 2-980, which removes it from the sapphire. Its 
colour is blue at first sight ; but when we view it in a plane 
perpendicular to the directton which had shown the blue, its 
colour is of a clear browu inclining to gray, This double colour 
made M. Cordier suppose that this stone was a variety of the 
dichroite. 
Of the Ligurite-—This stone has been discovered by Viviani 
im the mountains of Liguria near Genoa. This substance, whicls 
I have not seen, appears to several naturalists to be a variety 
of Titanite. 
Of the Chlorite in secondary strata.—It was once supposed 
that chlorite existed only in primitive strata, but it has since 
been found in secondary also. It is met with in the vicinity of 
Paris. Risso has also observed it in the environs of Nice. Near 
the castle of Nice, he says, there are regular beds of chloritous 
marl with belemnites. These facts show that minerals, which 
have been thought peculiar to primitive strata, may be trans~ 
ported into secondary. Lambotin has found fluor also in the 
environs of Paris; but it is crystallized with calcareous spar, 
which proves that it has been brought there and deposited. 
Of the Lherzolite.—I have given this name to a stone from 
Lhers in the Pyrenees, where Le Lievre found it: it appears to 
be a variety of smaragdite. 
Charpentier junior saw large beds of it in the same place. 
He regards it as a variety of augite, but augite has not as yet 
been found en masse. Vogel analysed it, and found as follows : 
RULER Weal alc stare v0 8m 
PRIME 2 is 5s Sin =. 6 Halen tod 
Lie os on ise cohae & hee 
Magnesia .....-seeeee 16 
Oxide.of fon! S35. .s0 12 
Oxide of chrome ...... 0°50 
Oxide of manganese a slight trace. 
AOS aa acer aie Ais aie boy oi 
This analysis approaches very closely to that of the green 
smaragdite, made by Vauquelin. 
Picotite—We sometimes find in the heart of the masses of 
lherzolite, 
