Chilton English Double Bass - swit194 Additional Information Peter Ratcliff Purpose of Collection: Archaeology, dating of musical instruments Notes: Spruce table from a mid 19th century English double bass belonging to Mr Roy Chilton, Trinity School, Croydon, Surrey U.K. The front is in four pieces, two of which are adequately measurable. The two central sections are from a book matched radially cut spruce wedge. Those two series, 1 & 2, contain very strong and representative signal resulting in highly significant statistical crossdating t-values with reference chronologies, the highest one being t=10.4, (t-values according to Baillie & Pilcher 1973) for the mean of the two series crossdated with the F. Schweingruber’s PCAB Obersaxen/Meierhof chronology from central Switzerland, strongly suggesting likely wood origin. Also statistically significant cross-matches of t>4 with over 500 sequences from musical instruments from various parts of Europe. COFECHA output: Chronology file name : SWIT194.CRN Measurement file name : SWIT194.RWL Date checked : 20JUL10 Checked by : B. Bauer Beginning year : 1713 Ending year : 1835 Principal investigators: Peter Ratcliff Site name : Chilton English Double Bass Site location : Switzerland Species information : PCAB NORWAY SPRUCE Latitude : 4700 Longitude : 00900 Elevation : 1500M Series intercorrelation: 0.887 Avg mean sensitivity : 0.159 Avg standard deviation : 5.722 Avg autocorrelation : 0.895 Number dated series : 2 Segment length tested : 50 Number problem segments: 0 Pct problem segments : 0.00 PART 5: CORRELATION OF SERIES BY SEGMENTS: Chilton Double Bass 11:07 Tue 20 Jul 2010 Page 5 ----------------------------------------------------------------------------------------------------------------------------------- Correlations of 50-year dated segments, lagged 25 years Flags: A = correlation under .3281 but highest as dated; B = correlation higher at other than dated position Seq Series Time_span 1750 1775 1800 1799 1824 1849 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 ENG_DB~1 1713 1835 .81 .96 .95 2 ENG_DB~2 1750 1834 .81 .96 .95 Av segment correlation .81 .96 .95 PART 7: DESCRIPTIVE STATISTICS: Chilton Double Bass 11:07 Tue 20 Jul 2010 Page 6 ----------------------------------------------------------------------------------------------------------------------------------- Corr //-------- Unfiltered --------\\ //---- Filtered -----\\ No. No. No. with Mean Max Std Auto Mean Max Std Auto AR Seq Series Interval Years Segmt Flags Master msmt msmt dev corr sens value dev corr () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 ENG_DB~1 1713 1835 123 3 0 .887 16.04 32.56 6.416 .893 .158 2.56 .425 .051 1 2 ENG_DB~2 1750 1834 85 3 0 .887 12.58 23.24 4.718 .898 .160 2.65 .459 .053 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 208 6 0 .887 14.62 32.56 5.722 .895 .159 2.65 .439 .052