Testing stone

    **** Moderator's comments:
    This query, forwarded by Sally Shelton, comes from a person who
    is not on the DistList and will not see any responses that are
    posted here.  Please respond directly to sender and if of
    general interest post it here as well

Is there a method to test stone for its ability to withstand the
elements?

The project in question involves replacement sandstone at the Old
Courthouse in St. Louis.  Approximately 20 yrs ago sections of
damaged sandstone were replaced with new sandstone.  Now the
replacement stone has deteriorated, while nearby original sandstone
is still in good condition.

Before the now deteriorating replacement sandstone is replaced, we
would like to get an assessment of the new sandstone's quality.

Bill Nelligan
NPS, Midwest Support Office

                                  ***
                  Conservation DistList Instance 11:79
                 Distributed: Wednesday, March 25, 1998
                       Message Id: cdl-11-79-019
                                  ***