420 Scientific Intelligence. 
Chemists will be surprised to learn that M. Belleville owes his suc- 
cess to the use of iron for the pipes alluded to. The drawing of this 
metal into pipes of a certain length—a recent invention by M. Gan- 
dillot—has come to the assistance of M. Belleville ; and the iron is so 
perfectly soldered as to resist the strongest pressure. 
** To create vapor in like manner as it is destroyed in the worm of 
a still,” says M. Seguier, ‘‘ was one of the most important problems to 
be resolved in the present state of science.” ‘There is also one other, 
which is, that of employing vapor directly, without an intervening 
medium. 
Much labor has been spent upon the study of reaction, and the known 
principle that reaction equals action. But that which is incontestable 
as a principle, has not yet been established by practice. ‘The invention 
contemplation for several years. 
It is evident that by the direct use of steam and the worm of M. Belle- 
ville, the steam engine will not occupy one-tenth the space, nor have 
a tenth part of the weight, nor cost as much by one-tenth, as the 
ordinary engine. 
It appears that the human mind cannot arrive at simplicity ee 
is li r 
rain from the first diaphragm to the scond, from the second to the third 
and so on. ~ esides, on the first diaphragm, which is convex, the W 
goes from the center to the circumference; on the second, 
possible surface, which is farther augmented in extent by the small holes. 
The diaphragms are kept at the right distance apart by rods of iron- 
