1) Posting must be relevant to the broad interests of collectors or historians of scientific instruments (no general antiques, politics, chain letters, etc.)

2) Market place-type postings are limited on one Wanted-to-Buy and one For Sale or Swap posting at a time. You may however, list any number of items in a posting (if you want us to delete your old posting so that you can re-post, e-mail us directly.)

3) The Forum must not be used to air personal grievances or disputes.