Help needed with uux and uucp through two machines

[jeff at heurikon.UUCP]

You can send mail from via one OR MORE machines, as in:
	mail macha!machb!person

However, you cannot, it seems, do similar things with uucp and uux, as in:
	uucp file macha!machb!/dir/file
	uux "macha!machb!uux command"

	.----.    .---------.     .--------.    .--------.
	| Me |----| my host |-----| mach a |----| mach b |
	`----'    `---------'     `--------'    `--------'
						Target machine

I've tried many forms of the commands, with " ' and \ characters
all over the place.  In all cases, uucp and uux always strip off
the name of the second machine, leaving just garbage.

Is this a limitation, or am I missing the obvious?
-- 
/"""\	Jeffrey Mattox, Heurikon Corp, Madison, WI
|O.O|	{harpo, hao, philabs}!seismo!uwvax!heurikon!jeff  (news & mail)
\_=_/				     ihnp4!heurikon!jeff  (mail - fast)