this rics article by Jeff Howell
http://www.rics.org/Builtenvironment/Buildingpathology/Dampandwateringress/moisture_measurement_in_masonry_19950901.html
referenced from this thread
http://www.diynot.com/forums/viewtopic.php?t=34549&start=150&postdays=0&postorder=asc&highlight=
which includes a few posts from our old friend Konrad - what happened to him btw?
There are some great pictures on that last link. I liked the house on the bridge buttress. A little more work needed on the automatic translator I am thinking.