174 Account of an Aérolite which fell in Moravia. 
Teven made the attempt myself, and I thus obtained agates 
furnished with cones presenting the aspect of organized bodies. 
The agate from Italy seems to have been polished after the 
blow, which has removed the summits of several cones from the 
middle of the stone, and has given them a strauge appearance. 
In this agate and in mine, small circles are seen with the mi- 
eroscope at the places where the blows have been given; on 
wetting, both the cones partly disappear on accouut of the liguid 
penetrating the fissures, but on drying alt these cones re-appear. 
The Marquis de Dree has in his fine collection an agate set i 
a ring, whicli he showed me lately, and which has cones that 
must have had the same origin. 
The object of this observation is to inform amateurs that 
foreign dealers know how to produce in certain agates very 
pretty effects, by an artificial arrangement, which they frequently 
give out to be natural, having effected it so as completely to 
deceive the eye. 
Account of an Acrolite which fell in Moravia, and a Mass of 
Native Iron which fell in Bohemia. By the same. 
Chevalier de Schreibers, superintendant of the Imperial col- 
Iection in natural history at Vienna, has communicated an ac- 
count of an aérolite exhibiting striking anomalies from all those 
hitherto known. I presented to the Geological Society of Paris 
two pieces of this variety: the smallest was given me at Milan, 
by Father Pini in 18138, as having fallen in Moravia: but not be- 
ing affected by the magnetic needle, and containing no ironin a 
native state, like all the other stones which have fallen from the 
atinosphere, I doubted its reality as an aéyolite: several persons 
even regarded it es a piece of acrucible. The largest piece was 
yivenine by M. Schreibers: itis still covered with its crust almost 
all over; itis not affected by the magnet, contains bo iron ina me- 
tallic state and no nickel, and is lighter than the common a€érolites 
of the same volume. [t presents a black shining and as if sha- 
green surface, which distinguishes it frem other aérolites at the 
tirst glance. MM. Schreibers personally ascertained that this 
stone really fell in Moravia, at Slavnera near iglaw, on the 22d 
of May 1303. 
The same gentleman gare me another very interesting piece: 
it is entirely native iron, and detached from a mass weighing 
upwards of 190 pounds, which fell at Ellenbogen in Bohemia. 
This piece has since been cut into the shape of a coin. It has 
the peculiar property when placed in weak nitric acid of being 
attacked unequally, and of then exhibiting blackish particles, 
and also some whitish in relief, which have a curious, arrange- 
ment 
