68 ss Deeription of the Copper-Plates [Now 
For the Monihly Magazine. Fo enable the ftudent to obtain “a 
more general and comprehenfive idea of 
mufical notes, a fet of emibreves, minims, 
crochets, &c. are made of tin, refemb- 
ling, in fhape, thefe charaéters, as they 
appear in print, and are placed above 
the bars in the margins ¢f the fecond 
: ie age ; the names, properties, and for 
tion, to fet their own mufic in tangible icine scab rel tall aad are 
igre ae si inthe aa Ge tecte large his knowledge of the art, but ren- 
A; hich der him more accurate in communicating 
AGE if. The CL, Gah ae Pe knowledge to others, particularly to 
mufic is to be fet. This page is di- 
FE ee , thofe who have fight. ~~ i 
vided by eighteen’ parallel lines ; each _ The portable fize of this machine’ ex- 
line being: reprefented by two brals cludes the poflibility of fetting whole 
firings, between which the pin fhould syne, rhevebm 4): rlse iNea eae Behee 
pals whem a note is to be placed on 2 line, only to enable the ftudent toacquire a 
to prevent miftakes which would fre- theoretical and practical knowledge of 
quently happen if the lines were fingle. 
: its principles, for which the compa{s of 
Some of thefe lines are plain and others!’ 2 foun bars ae: GeiRICHE 
a» twifted. 
at . When as much mufic is fet as the - 
* The four loweft F.A.C.E. are plain, length of the ftave will admit, the cha- 
and reprefent! the ledger lines in the 
racters may he withdrawn, and replaced 
bafs. é in their refpeétive fquares, ready te bé- 
The next five, G.B.D-F.A, are twit. P aot Grae 
" : gina new pafiage. | 
ed, and correfpond with the five lines, When the ftudent has acquired a tho- 
or fave, in the bafs. 
; 4 rougn knowledge of the principle of this 
The line above is plain, and denotes machine, and is defirous to fer movements 
the middle C. of the inftrument. 
é at length, one or more frames may be pro- 
The next tive, E.G.B.D.F. are twifted, vided with cufhiions, eath awerddong) fi 
and anfwer to the five lines, or ftave,in inches broad, and one inch thick, having 
the treble. 
bigs ’ ftrings on both fides alike ; fothat when 
The next three, A.C.E. are plain,and one fide is full, he may procéed on the 
reprefent the ledger lines in alt. other, covering the fir fide with a thin 
The {pace above is F. which completes poard; for which purpofe, the frames 
the fcale, and provides a line or fpace 
may be made to rife on each fide a quar- 
for each key of the harpficord, as appears ter of an inch higher than the euthions ; 
by the letters on the margin. 
ae and thus he will be enabled’ to retain his 
Additional keys may be provided for compofitions till tranfcribed. 
by changing the cliff. sie Mr. Currstix has alfo in fome fer- 
When the ftudent is become familiar wardnefs an invention which willenable 
with the fcale, he may proceed to ac- the performer (with or without fight) 
quire the names, properties and feelings, to write mufie in the aé& of playing on 
of the characters dn the organ or harpficord, and by which 
~ Page 2d. Avcufhion divided into fix- extempore mufic may be preferved. 
teen {quarcs, in which are plaged the cha- 
P.S. In our Magazine for July, we defcribed 
raéters : fix made of cork or leather; Mr, Chriftie as refident at the Afylum in Li- 
fix for card paper, a little fmaller; and yerpool, which was a miftake, as he only at- 
four, pins headed with fealing-wax. tends there to inftruét the mufical pupils be- 
By thefe, with fome eafy combinations, longing to that inftitution. 
upwards of fixty of the notes, marks, . oe yiby 
and terms, ufed in harpfichord mufic, . Zo the Editor-of ihe Monthly Magazine. 
DESCRIPTION OF THE THEOGRAPH. . 
By Jouw Curistisz of Liverpool. 
(See the Plate.) 
Defigned for initiating young pupils in the art 
of mufic, and to enable them not only to 
read, but, if they have a tafte for compofi- 
are provided for, and, if more be want- SIR, 
ed, they may. be readily fupplied by the I Lately difcovered a property belong- 
fiudent’s own invention, as thefe are + ing to the elaftic refm, caoutchouc; 
_ capable of a much more extenfive combi- popularly called India rubber, which, 
nation. In organ mufic,the names of the J believe, has not hitherto been noticed. 
ftops, with all the various modes of ex- This property may be afcertained in the 
preffion, may be fignified. A minute in the following manner: 
detail of the combinations already form- Take a quarter of a fheet of writing- © 
ed, would be confidered rather too ex- paper, hold it to the fire till it be pretty _ 
tenfive for our limits. ‘ Warm, and then immediately lay it upon — 
a table, 
