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Paul Denecke, University of Arizona, conducted the following experiment using a VCR equipped with a digital tape-counter. He put a tape in the unit, set the tapecounter to zero, and, as he started the tape playing, noted the time. He then kept recording the time and the number on the tapecounter. This data set was obtained in this way. It shows the number of revolutions - the number on the tapecounter - (second column) as a function of time in seconds (first column).

1st col	2nd col
0	0
600	113
1200	238
1800	383
2100	465
2400	556
2700	662