Tomatoes 101. Learn how to make and can salsa and diced tomatoes using a boiling water canner, including necessary equipment. 3rd of a 4-series class by Cornell Cooperative Extension. Costs $20 or $15 each if you take 2 or more. Registration is required, contact or 518-:765-3552. From 5:30 to 7:30 p.m. at Cornell Cooperative Extension of Albany County, 24 Martin Road, Voorheesville, NY