Thanks to Kay Lancaster for words of wisdom, reason, and comfort on
handicapped access.  The detailed discussion is much appreciated, and
corroborates my personal assumptions about the ADA or what I thought it
should say--I just didn't know for certain, never having read it.  Lawmakers
are capable of making terrible, unfair mistakes, sometimes unconstitutional
ones, as in the case of the federal honorarium ban--but sometimes they get it
right.

As for several sets of labels in an exhibit to accommodate people reading at
different heights (or for whatever reason), this is sometimes unsatisfactory
from the standpoint of cluttered design, but I like the idea of supplementary
handouts, which are eminently doable in this age of computers and copiers, if
your printing budget is limited.  The printed booklets in various languages
which were available in the Vermeer show in The Hague, for example, solved
several problems in addition to the multi-lingual issue: they enabled
everyone to read explanatory texts at a comfortable distance, and kept the
traffic flowing more freely than lengthy wall labels.

--David Haberstich