The jar and discord of life may often be modified by balancing one
discord against another or by changing the rate of effort. Sometimes
to go faster in one direction or slower in another brings harmony and
peace.
It is rather interesting to call attention to the recent
improvement in the running conditions of the steamship
_Mauretania_, which, it will be remembered, is driven by
four steam turbines, and which recently damaged one of her
propellers. While repairing the latter, advantage was taken of
the opportunity to change the propeller-blades a little, and it
is said the change reduced very appreciably the vibration of the
vessel. It seems that there was more or less resonance between
the vibration caused by the propeller-blades and the speed at
which they were driven; so by throwing the two out of harmony,
the effect is damped out. Doubtless similar conditions exist
elsewhere and frequently are the cause of the entire trouble due
to vibration, and by some slight change, throwing the apparatus
or its support out of tune, the effect is removed.--_The
Electrical Review._
(3386)
See COMMUNICATION, PSYCHICAL.