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appreciation of sounds; and those who perceive two different sounds, the 
i la and another note, not only do not love music, but detest and avoid it; 
i and he proposes by this method to discover among young people those 
: who may become musicians, 
Mr. Jobard has still under enquiry, whether the note which is produced 
in the head by a quick motion is the same or not in all persons. The 
thousand, especially when the oxyd of carbon is added to it. But ten 
4 tunnel, forty-seven kilometers, the destructive condition would soon be 
reached—the interior capacity of the subterranean passage being only 
y substituting an elect gn hi 
could be thus obtained) I propose to employ a machine with compre 
_ air—which will supply 
_ First—the motive power. 
Secondl 
diy—the air necessary for use. ceca 
experiments of Mr. Andraud and those of Mr. Julienne have een 
ascale so large as to place beyond doubt the feasibility of u: 
ir for locomotion. By their experiments we know th: A 
r of air at 8 atmospheres (that is, 8 cubic meters reduced to 
is obtained of transporting on rails a charge of 15 tons t0 
