Bravo, David Harvey! You've posed the key question: does anyone move from measurement to interpretation to action (if it's needed)? I've seen a number of collection areas where the recording hygrothermographs are proudly on display (as required), but they might as well not be there because nobody does anything with the information they produce. It does still take a sentient human to effect and maintain proper environmental conditions. TV Tom Vaughan \_ Cultural The Waggin' Tongue \_ Resource [log in to unmask] \_ Management, 11795 County Road 39.2 \_ Interpretation, Mancos, CO 81328 USA \_ Planning, & (970) 533-1215 \_ Training