MUSEUM METEORITES—HONEYMAN. P25 
one hand, peridot may constitute almost the whole mass (Chas- 
signy); on the other, a silicate less basic may predominate 
(Bischopville.) 
2nd. Another group without peridot, poor in magnesia, 
containing alumina in notable quantity, is characterized by a 
granular anorthite and pyroxene, and by its analogy with certain 
lavas (Jovinas, Jonzac, Stannern.) 
3. The last type is characterized in a very remarkable manner 
by the presence of carbonaceous matter (Alais, Orgueil). 
I. Synthetic experiments relative to meteorites. 
THE WIDMANSTZ2TTIAN FIGURES. 
“ The most characteristic physical feature of the meteoric iron 
is the crystaline structure which appears on a surface that has 
been polished and then treated with an acid,” e.g., the Madoc 
meteorite of Canada and the Glorietta mountain meteorite. 
“The regular design which then appears has been named after 
the Savant who first recognized them. Since then the structure 
has been the subject of profound observation by Haidinger, 
Reichenbach and Gustave Rose. . 
The figures are produced not only by crystallization but also 
by the homogeneity of the mass and by the separation mode of 
a substance not so easily acted on by acidsasiron, The substance 
so disseminated in the middle of the iron is considered to be the 
phosphuret of iron and nickel, with the first predominating. 
Up to the present we have not been able to imitate this remark- 
able structure. 
In trying to reproduce it I have melted the meteoric iron of 
Caille, Var., &e. 
The chemical analyses have been made by M. Stanislaus 
Meunier attaché to the Geological Laboratory of the museum of 
the Ecole des Mines, to whom I have the pleasurse of rendering 
justice for the care which he has brought to their execution. 
PERIDOT OR OLIVINE. 
“Stromeyer has marked a singular contrast that the composi- 
tion of this mineral presents. The terrestrial almost all contain 
