156 Scientific Intelligence. 
exposing the metal, a silicate of which is to be formed, when at a 
red heat, to the vapor of water and that of silicon chloride. This 
method is regarded by the author as of especial interest as imita- 
ting the conditions realized in the natural formation of the primi- 
tive minerals of which we have examples in various types 0 
" h ; 
sponges. Meunier remarks, with some humor, that it is sig- 
nificant that these supposed fossils can be formed in a porcelain 
tube heated to redness y varying the conditions the author 
meteorites.— C. R., xciii, 737. 
14, Supposed Organic Remains in Meteorites—A year since 
_we should have a rock essentially identical with that of natural 
: rman to 
describe. a large series of fossil sponges, crinoids, corals, and 80 
It is only simple justice to Mr. Hahn to say that while his con- 
clusions will not be accepted, his memoir is a most valuable con- 
tribution to the study of the structure of meteorites. The photo- 
graphic plates which accompany it are remarkably beautiful and 
can be studied with profit. It is only the author’s interpretation 
of them which is at fault. 
