Response of M. J. Heslop, G. Mason and A. Provatas to authors' reply

In their previous communication, Barigou and Davidson
(1994) raised several points.
As suggested by Barigou and Davidson (1994), we have
now modified our experimental arrangement to allow the
pressure difference AP to be measured with a tapping in the
main tube. This necessitated the construction of another
perspex block, through which a small hole was drilled, to
form the pressure tapping. The additional perspex block was
added to our original apparatus between the perspex base
containing the soap solution and the perspex adapter containing the cylindrical tube under investigation. A rubber
teat was attached to a tee-piece near to the pressure tapping
to blow out the liquid deposited as the Plateau border of the
soap film goes past. Upon purging, the liquid blew out as
a bubble which then formed two soap films as the bubble
contacted the other side of the cylindrical tube. Investigation
of single film behaviour thus required two of the resulting
three films to be broken.