Some of the materials for pressure canning are laid out Tuesday at the Lewiston Public Library for a class on preserving carrots by pressure canning. Andree Kehn/Sun Journal

Kate McCarty, second from left, the University of Maine Cooperative Extension food systems professional, leads a class Tuesday on pressure canning in the Callahan Room of the Lewiston Public Library on Lisbon Street. Helping prepare carrots are, from left, Jeanette Mcquerry, McCarty, library adult services technician Caitlin Ramsay and UMaine Cooperative Extension volunteer Lali Constantino. The class reviewed safety measures before getting hands-on experience in canning. Andree Kehn/Sun Journal