At 10:26 AM 5/6/97 PDT, you wrote:
>We are in the process of developing exhibit guidelines for open display, ie
>what is the optimum distance for barriers, types of barriers, types of
>plinths , what sort of signage system in use.  We're trying to find the
>balance between display of objects & protecting them. Any ideas?

We have extensive open displays and while it may enhance the visitors
experience, it can open up conservation concerns as well as maintenance
concerns.  This depends upon what you display of course.  Most of our
exhibits are completely fabricated, but we do have animal collections
incorporated into the dioramas.  They collect dust, people touch them if
they are within reach, and you loose the buffering effect on humidity and
temperature that enclosed cases can provide.

Our barriers vary from wide (~14") wooden barriers with signage mounted on
top, to metal pipes (bent corners and no visible welds) again with signage
mounted on them, to tempered glass barriers with a brushed aluminum tube
running along the top.  In terms of aesthetics, I prefer the later as small
children can see through the glass, but cannot crawl through.

As with any system there are drawbacks and advantages. Hope this is somewhat
helpful.  Contact me if you need more information.

Anthony E. Kerwin
Curator of Exhibits
                        Pacific Northwest Museum of Natural History
                        1500 E. Main St.
                        Ashland, OR 97520
                        Phone: 541-488-1084     FAX: 541-482-1115