In a message dated 96-09-08 02:55:23 EDT, you write:

>
>In the case of the block valves, the bottom can be removed and
>a leather pouch installed.

I'm curious if they are sealed leather puches-  would you know if they
are and what type of sealant was used? Sometime ago,  the possibility
of egg white diluted with water or "something else" was brought up in
this group.  Any new input?

S.K.Goodman