ed, just like the strings of a violin.

ELECTRIC HARMONY.--Every sound produces a corresponding vibration in
surrounding objects. While each vibrates, or is capable of transmitting
a sound given to it by its vibratory powers, it may not vibrate in
harmony.

When a certain key of a piano is struck every key has a certain
vibration, and if we could separate it from the other sounds, it would
reflect the same sound as the string struck, just the same as the walls
of a room or the air itself would convey that sound.

But as no two strings in the instrument vibrate the same number of times
each second, the rapid movement of successive sounds of the keys do not
interfere with each other. If, however, there are several pianos in a
room, and all are tuned the same pitch, the striking of a key on one
instrument will instantly set in vibration the corresponding strings in
all the other instruments.

This is one reason why a piano tested in a music wareroom has always a
more beautiful and richer sound than when in a drawing-room or hall,
since each string is vibrated by the other instrument.

If a small piece of paper is balanced upon the strings of a violin,
every key of the piano may be struck, except the one in tune, without
affecting the paper; but the moment the same key is struck the vibration
of the harmonizing pitch will unbalance the paper.

The musical sound of C produces 528 vibrations per second; D 616, and so
on. The octave above has double the number of vibrations of the lower
note. It will thus be understood why discord in music is not pleasant to
the ear, as the vibrations are not in the proper multiples.

ODORS.--So with odors. The sense of smell is merely the force set in
motion by the vibration of the elements. An instrument called the
_odophone_ demonstrates that a scale or gamut exists in flowers; that
sharp smells indicate high tones and heavy smells low tones. Over fifty
odors have thus been analyzed.

The treble clef, note E, 4th space, is orange; note D, 1st space below,
violet; note F, 4th space above clef, ambergris. To make a proper
bouquet, therefore the different odors must be harmonized, just the
same as the notes of a musical chord are selected.

A BOUQUET OF VIBRATIONS.--The odophone shows that santal, geranium,
orange flower and camphor, make a bouquet in the key of C. It is easy to
conceive that a beautiful bouquet means nothing more than an agreeable
vibratory sensation of the olfactor