[ 450 ] 
Grave Mafic from brisk, flow from fafl, <&c. will 
be better diftinguifhed by this Machine, than in the 
ordinary Way by the Words Adagio , Allegro , Grave , 
\ Treftoy &c, for, by thefe Words, we only know in 
general this muft be flow or fafl, bat not to what 
Degree, that being left to the Imagination of the 
Performer y but here I know exactly how many Notes 
muft be play'd in a Second of Time •> viz . as many 
as are contain’d in i Inch of the Scroll perBoflulatum 
p. 447- 
Lattly, Whereas, in the ordinary Way of writing 
Mufic, you have either no Character for Graces, or 
fuch as do not denote the Time and Manner of their 
Performance, here you have the minuted Particles of 
Sound that compofe the moft tranfient Graces ma- 
thematically delineated. 
N. B. Tho’, to facilitate the Demonftration, I fup- 
pofe the Pencils to be fixed under the Heads of the 
Keys, and confequently to require a very broad 
Scroll to pafs under them $ yet I intend the Pen- 
cils a more commodious Situation, viz , the Mo- 
tion of the Keys to be communicated by fmall 
Rods to them (which I know better how to do than 
to defcribe, the Scheme would be fo perplex’d). 
The Pencils are to be made of Steel, and ranged 
in clofe Order like the Teeth of a fmall Comb, 
fo that a very narrow Scroll will do. I can pre- 
pare the Paper to receive a very black Impreflion 
from the Pencils at fo cheap a Rate, that, at the 
Expence of 6 d . in Paper, I can take in Writing 
all the Mufic that the fwifteft Hand fhall be able 
to play in an Hour. 
Ill 
