C 446 ] 
A \ 'Demonftration of the Tojftbility of making a 
Machine that fball write Extempore Voluntaries 
or other Pieces of Mafic, as f aft as any Alafter 
fhall be able to play them upon an Organ, Harpfi- 
chord, &c. and that in a Char a£ter more natural 
and intelligible , and more exprejftve of all the 
Varieties thofe Inftruments are capable of exhi- 
biting , than the Character now in Ufe . 
Maxim I. 
A LL the Varieties thofe Inftruments afford fall 
under thefe three Heads: Firft, The various 
Durations of Sounds, commonly called Minims , 
Crotchets , &c. Secondly , The various Durations of 
Silence, commonly called Refts. Thirdly , The va- 
rious Degrees of Acutenefs or Gravity in mufical 
Sounds, as Are,B mi> &c. 
Maxim II. 
Strait Lines, whofe Lengths are geometrically pro- 
portion'd to the various Durations of mufical Sounds, 
will naturally and intelligibly reprefent thofe Dura- 
tions. Ex.gr. 
= O 
The firft Line (being 2 Inches) reprefents a Semibreve . 
The fecond is 1 Inch, and denotes a Minim . 
The third is half an Inch, and fignifies a Crotchet , 
The fourth is a Quarter, and anlwers to a Quaver. 
The fifth is an Eighth, and (lands for a Semiquaver . 
Maxim 
