Unless you're making very small, quickly eaten batches, you may want to invest in a pressure canner.
Here's an excerpt from "Presto's" web page:
"If you're a novice to pressure canning, this outline will give you a basic knowledge of the terminology and instruction of canning.
The key to successful canning is understanding the acidity and spoilage factor of the food you wish to can, as well as the acceptable canning methods to process those foods.
There are two types of food, categorized as low-acid (vegetables, meat, poultry, and seafood) and high-acid (fruits and tomatoes). Both can be successfully canned by pressure canning.