A few decades ago I noticed public libraries began to remove older books of the technical kind. I "rescued" a couple back then. Today my technical "searches" are failing for much of the stuff I can remember, when I am hoping for an easier way than copying to screen, from my books. Now the Internet. Try searching for the magnetic properties related to alloy steels for example. What is the composition of steel alloys used in permanent magnets.. Only loosely defined info described as OBSOLETE is available. This also goes for any material based on early research that might negate or contradict climate change another example. Often some info is hinted at, but you have to fork out a price tag for the article un seen, sometimes as much as $50. just to view. No thanks, the crucial info I want won't be there. Wiki is definitely loaded with misinfo and distortion amongst good stuff. I wonder why. We all know that it is not possible to patent and own any process that is on or has ever been on the public domain. There are many really valuable ideas out there back then. What better way for a greedy elite to exploit something from the past than to remove it from all public records. Yours or my private collection would hardly make any challenge effective. Have you ever noticed how some Old Hat knowledge is being rediscovered in the news occasionally. I used to just laugh. But if little old you or me re-discovers it, and tries to patent it.. watch out. Personally If I have a great idea proven and worth millions I'd put it on the public domain everywhere right away. Philip