Improvements in musical keyed Instruments. $95 
against the inside of the ribbed drum, or cylinder F, so as 
to open the ears and let out the corn, though the ears 
come in any position whatever, At H is a grating, upon 
which the beaters deliver the corn, chaff, and straw alto- 
gether; the two former fall through upon the ground at 
X, and the latter slides down on the grate; the corn is 
afterwards to be dressed in a winnowing machine, which 
separates the light and heavy corn from the chaff. The 
curbs F are fixed by screws, which can be adjusted so as 
to bring the cylinder nearer, or further from, the beaters, 
to adapt the machine for thrashing different kinds of grain; 
for it is evident that large corn, as peas, beans, &c. must 
require more space to rub them in than the smaller grain, 
as wheat and barley. L, fig. 1, is one of the uprights of 
the frame which supports the bearing for the axis B of the 
cog-wheel; and M is an oblique brace, which strengthens 
the frame. WN is the stage on which the man who feeds 
the machine stands. 
*,* This communication was accompanied with various 
certificates from most respectable individuals largely con- 
cerned in the agricultural line; all agreeing that Mr. Lee’s 
thrashing mill is superior to any they had before seen. 
LVIIT. On the recent Improvements made in musical keyed 
Instruments, with Copies of the Specifications of three 
Patents lately guanted for these Purposes, to Mr. Hawkes, 
Mr. Loeschman, and Mr. Liston. 
Thue interest, which has” been “ahd seems further likely to 
be excited, by the recent improvements in musical Intru- 
ments, and the probability that now appears, of the mathe- 
matical theory of musical Intervals receiving a more direct 
and useful application to general practice, than has hitherto 
been the case, I am induced to lay before my readers copies 
of the specifications enrolled in the patent offices, by Mr. 
William Hawkes, Mr. David Loeschman, and the Rev. 
Henry Liston, for explaining their three several inventions ; 
which being here brought together, the nature and peculia- 
rities of each may the easier be understood by my readers, 
and their several merits apprtciated. EDITOR. 
Specification of the Patent granted to Mr. William Hawkes, 
0 Newport, in the County of Salop, for Improvements on. 
musical keyed Instruments with Twelve fixed Tones.— 
Dated July 25, 1808. 
To all to whom these presents shall come, &c.—Now 
X3 ; know 
