We propose an experimental method, using curvilinear regressions, called corridor method, for dating and building a global useful signal based on oak ring widths in northern and eastern France. The resulting signal seems to be more useful than others to progress in the domains of ancient climate and ancient environments: dendrodating, dendroclimatology, dendroecology and, of course, human history (Lambert, 2002, Houbrechts and Lambert, 2004, Durost, 2005). However, we were lead to adapt or reconsider several basic mathematical functions, meteorological indexes or common dendrochronological definitions. We are currently working towards the publication of a large Data Base (web-DB). A first element of this DB can be consulted on the website of the ChronoEcology laboratory (French keywords: chrono-Ecologie, dendrochronologie). A discussion has opened about the participation of private contributors to such a public DB. The private contributors to this note agreed to show a part of their data without rights (money) and to justify explicitly their owndating procedures
