is hung inside by a strap, can be rung by shaking the globe, and the
sound of it increased gradually by letting air flow into the globe. In Ven
(1898), but not in Ven (1882a). Koenig (1889), 30, no. 64; Guillemin
(1877), 792.
505 SONOMETER: SPRING (667) 1854
Unsigned; possibly by W.M. Logeman, Haarlem
Base 396 x 272; overall height 900
Mahogany baseboard with a vertical oak board paintetifwhite, with
hook at top to tension a flexible iron strip ® 2 x 10 x 0.7). The strip is
set in motion by an electromagnet wi® adjustment plunger and trigger.
The vibration nodes are seen against the white ground. Described as
vibration apparatus after Dove, it was purchased in 1854 for Dfl. 54.
Deschanel (187SM85.
506 SONOMETER: WIRE (265) 1865
Signed: RUDOLPH KOENIG A PARIS
Board 1300 x 140; height 215
Above the mahogany sounding box are two fixed wires, attached to
posts that may be turned by a key, and between them is another wire
with one end fixed while the other runs over a pulley so that it can be
weighted and so- stretched. Underneath these wires are three divided
scales. A metre scale divided into millimetres allows the bridge positions
to be noted. A violin bow | | associated with this apparatus. One fixed
wire .is provided with a tempered chromatic scale, the other with the
natural scale, and the harmonic divisions of the chord.
In his Catalogue, Koenig describes t|S| instrument as a differential
sonometer after Marloye, and he priced it at 100 francs. Albert
MarloyeK. W95-1874) was the first specialist acoustic apparatus
maker in Paris, flourishing during the period 1840 to 1855.
Koenig~(1865), 22r no. 128; Deschanel (1877), 830-835; Brenni (VI).
5 0 /S WIND CHEST (749) 3/4 19th C.
Signed: RUDOLPH KOENIG A PARIS
Base 280 x 175; overall height 745
Cast iron base supports a mahogany chest into which plug two organ
pipes of pine wood marked UT3, both with Koenig stamps. Both have
gas jets and sliding baffles at the top over holes. One is open on the top,
theiiiher closed with a lead cover. The apparatus is for comparing the
vibrations of two air columns b.v the use of manometric flames., for
which a rotating mirror is necessary, such as 526. Purchased at auction
in 1889. Koenig^fl 865)| 4 ||® | no. 215; (JStillemin (1 8 |||||2 0 1 , fig.
140.
508 AIR PUFFER (785)7 3 /4 19th C.
Base,250 x 168; overalbheight 265; drum diameter 141,-length
200
A black lacgpered metal drum is held horizontally by a tapered support
on a beech baseboard. One end of the drum is covered with a bladder,
while the other has a small hole (diameter 28) in the metal disc. If the
drum is filled with smoke, and the bladder tapped, then smoke-ring
vortices will issue from the hole.