List of Patents. 201 
The choice of the hammer is happy, because it affords M. Isoard 
the real advantage of restoring to his strings their original sound ; 
by lowering the moveable case, the string being struck when out of 
the slit where it receives the action of the air, emits only the sound 
of the piano. He can then, by means of a simple pedal, which raises 
or depresses the air-case at pleasure, suddenly change the nature of 
the sound of the instrument, and this power offers numerous resources 
for varying the musical effects. By dividing the air-case into several 
portions separately moveable, each including an octave, it would be 
easy to combine the two kinds of sounds; for example, the sound of 
the piano might be retained for the high strings, and that of the reeds 
given to the low strings, or vice versa. 
The poverty of the artist has prevented him from presenting to 
you his work realized according to his designs, and he has been obliged 
to submit it attached to a very poor piano. He regrets exceedingly 
being unable to allow you to hear a much more powerful instrument, 
but he feels confident that in the rudiments of so incomplete a speci- 
men, your sagacity will recognise its fundamental principle-—( Comptes 
Rendus, vol. xiii. p. 969.) 
List of Patents granted for Scotland from 22d September to 
22d December 1841. 
1, To Tuomas Gore of Manchester, in the county of Lancaster, machine- 
maker, “certain improvements in machinery or apparatus for roving, spin- 
ning, and doubling cotton, silk, wool, and other fibrous materials.”—24th 
September 1841. 
2. To James Warren of Montague Terrace, Mile End Road, in the 
county of Middlesex, gentleman, “an improved machine for making screws.” 
—30th September 1841. 
3. To GEorcE Enetanp of Westbury, in the county of Wilts, clothier, 
“ improvements in weaving woollens and other fabrics, and for twisting, 
spooling, and warping woollen and other fabrics; also for improvements in 
the manufacture of woollen doe-skins.”—30th September 1841. 
4, To Wixi1aM Cuurcu of Birmingham, in the county of Warwick, gen- 
tleman, “certain improvements in hooks and eyes, and in machinery for 
manufacturing the same.”—4th October 1841. 
5. To JosepH Mixxer of Monastry Cottage, East India Road, in the 
county of Middlesex, engineer, “ an improved arrangement and combination 
of certain parts of steam-engines used for steam navigation.”—8th October 
1841. 
6. To Joun Varuey of No. 3 Bayswater Terrace, Bayswater, in the 
VOL. XXXII, NO. LXIII.—JANUARY 1842. 2) 
