Food & Cooking
Only two processing methods are recommended for canning food. These are the boiling water bath and the steam pressure canner. All other methods are unsafe and should be avoided by the home canner.
"SP325-A Food Preservation Methods of Canning," The University of Tennessee Agricultural Extension Service, SP325A-5M-9/02(Rep) E12-4815-00-003-03, http://trace.tennessee.edu/utk_agexfood/5