In a message dated 10/10/2009 12:19:08 P.M. Eastern Daylight Time,  
[log in to unmask] writes:

Cylinders were very short in duration, first only two  
minutes  in length 


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Brown wax cylinders (1890-1901) were recorded at a much slower  rpm 
(100-120) and hence capable of playing 3- 4 minutes even at the old  grooving of 
100 tpi. This is all explained in ECR.
 
Allen
 _www.phonobooks.com_ (http://www.phonobooks.com)