adjusting note spacing with lilypond 1.4

[Robert A. Knop Jr.]

I'm using lilypond 1.4, and believe that the default note spacing is
coming out a bit too dense.  (I find that the ease of sightreading music
is influenced greatly by the note spacing, and too dense music can make
sightreading much harder.)

How do I tell it to globally space the notes a bit more?  I've searched
lots of mailing list archives and web pages, and came up with the paper
parameters "arithmetic_basicspace", but those don't seem to work with
lilypond 1.4.  The reference manual online doesn't yeild any useful
information on the topic (or at least I haven't found it).

So how do I tell lilypond to space out the notes a bit more?

-Rob
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