two firings in this proportion, will coincide 
at every 5th repetition. And Co of other 
concords, Difcords are the tones whofe Vi- 
brations never coincide. They are never- 
thelefs of indifpenfible ufe in Mufic a? a foil, 
nd as the means of introducing concords 
with advantage. 
In writing all this, I have not the mod 
diftant intention to make a Compofer of 
you. It is the philofophical part only of 
Mufic, which I have endeavoured to ex- 
plain; that part which every philofopher (I 
fuppofe you intend to be a philofopher) 
fhould know, and which may be perfectly 
underftood without being able to play a note 
on any mftrument. 
I mean now to confider your queftion 
ee Whether I would advife you to learn to 
play, and on what inftrument?" From 
the following reflections you will collect my 
opinion of this matter. 
The practice of Mufic, is, doubtlefs, an 
innocent and delightful amufement; and, 
becaufe it is delightful, very improper for 
thofe who have no time to fpare. But, fay 
the advocates for Mufic, it is a better re- 
laxation and relief from fludy, than mere 
jdlenefs. There are two anfwers to this plea: 
firlt, 
