Shop, found that the Sounds proceeding from
the Hammers were either more grave or acute, according to the
different Weights of the Hammers. The Philosopher, to improve this
Hint, suspends different Weights by Strings of the same Bigness, and
found in like manner that the Sounds answered to the Weights. This
being discover'd, he finds out those Numbers which produc'd Sounds
that were Consonants: As, that two Strings of the same Substance and
Tension, the one being double the Length, of the other, give that
Interval which is called Diapason, or an Eighth; the same was also
effected from two Strings of the same Length and Size, the one having
four times the Tension of the other. By these Steps, from so mean a
Beginning, did this great Man reduce, what was only before Noise, to
one of the most delightful Sciences, by marrying it to the
Mathematicks; and by that means caused it to be one of the most
abstract and demonstrative of Sciences. Who knows therefore but
Motion, whether Decorous or Representative, may not (as it seems
highly probable it may) be taken into consideration by some Person
capable of reducing it into a regular Science, tho not so
demonstrative as that proceeding from Sounds, yet sufficient to
entitle it to a Place among the magnify'd Arts.

Now, Mr. SPECTATOR, as you have declared your self Visitor of
Dancing-Schools, and this being an Undertaking which more immediately
respects them, I think my self indispensably obliged, before I proceed
to the Publication of this my Essay, to ask your Advice, and hold it
absolutely necessary to have your Approbation; and in order to
recommend my Treatise to the Perusal of the Parents of such as learn
to dance, as well as to the young Ladies, to whom, as Visitor, you
ought to be Guardian.

I am, SIR,

Your most humble Servant.

Salop, March 19, 1711-12.

T.

[Footnote 1: John Weaver.]

* * * * *

No. 335. Tuesday, March 25, 1712. Addison.

Respicere exemplar vitae morumque jubebo
Doctum imitatorem, et veras hinc ducere voces.

Hor.

My Friend Sir ROGER DE COVERLEY, when we last met together at the Club,
told me, that he had a great mind to see the new Tragedy [1] with me,
assuring me at the same time, that he had not been at a Play these
twenty Years. The last I saw, said Sir ROGER, was the Committee,