tonometer
Date1880-1900
Inventory Number1998-1-0140a
ClassificationTonometer
Subject
Maker
Valantine & Carr
fl. 1870 - 1930
Cultural Region
Place of Origin
Dimensions10.5 x 36 x 19 cm (4 1/8 x 14 3/16 x 7 1/2 in.)
box: 17.8 × 43.8 × 33 cm (7 × 17 1/4 × 13 in.)
box: 17.8 × 43.8 × 33 cm (7 × 17 1/4 × 13 in.)
Material
DescriptionSixty-five tuning fork tonometer without resonating boxes, held in four velvet-lined trays in a leather-covered wood box. One side of the box is missing. There are fifteen tuning forks per tray, except for the top tray which has space for 20 (three are missing).
Each fork has been stamped with the maker's name on one side and its frequency on the opposite. This large set was made for frequencies ranging from 256 to 512 VD (or vibrations doubles).
There is an extension set (1998-1-0140b) accompanying this one with frequencies ranging from 516 to 540 VD.
Each fork has been stamped with the maker's name on one side and its frequency on the opposite. This large set was made for frequencies ranging from 256 to 512 VD (or vibrations doubles).
There is an extension set (1998-1-0140b) accompanying this one with frequencies ranging from 516 to 540 VD.
Signedon each fork: VALANTINE & CARR
Inscribedtop of case, stamped: TONOMETER / 256 - 512
Curatorial RemarksHoused in blue board lidded box with 1998-1-0140b
FunctionWas used for precise measurements of beats. It was invented by Johann H. Scheibler and it usually came with resonators to amplify the forks' pitches and beats. The resonators were not necessary though.
Valantine & Carr
Date: circa 1880
Accessories: has bolt
Object number: 1998-1-0675
Rudolph Koenig
Date: circa 1890
Object number: WJ0042
Valantine & Carr
Date: circa 1880
Accessories: bolt
Object number: 1998-1-0674
Rudolph Koenig
Date: circa 1889
Object number: 1997-1-0884
Rudolph Koenig
Date: circa 1865
Object number: 1996-1-0421
See also/See also
