Hi,
 
  This cessation would be in 2 stages, the first when Columbia
discontinued their production of black WAX cylinders, and the 2nd when they dropped
their output of Indestructible (celluloid) cylinders. Both exact dates are in
PHP, but I can double-check it.
 
Allen
  _www.phonobooks.com_ (http://www.phonobooks.com)
---------------
In a message dated 2/15/2013 6:19:22 A.M. Eastern Standard Time,
[log in to unmask] writes:

These list cylinders.Just curious when did Columbia discontinue cylinders?
 Roger