Feature Copper Put into Auto Valves to Make Them Last Longer By Science News Magazine Issue: Vol. 20 No. #535, July 11, 1931 Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Having trouble viewing this? Open in a new window