Strip corn husks and silks from corn (you may not be able to get all of the silks, but we’ll take care of that later)
Place an ear of corn in a large bowl, holding one end, keeping the corn cob vertical, or nearly vertical
Use a sharp knife, or corn stripper, keeping parallel to the cob and working in a downward motion, to cut the corn kernels from the cob
When you bowl is full of corn, or you’re finished cutting the corn, fill the bowl with water, and stir the corn a bit to encourage pieces of husk and silks to float to the top
pour the water off, and the silks with it
Pack corn into sterilized canning jars, leaving half, to one inch of headspace
If using quart jars, top the corn with 1 teaspoon of salt. If using pint jars, top with 1/2 teaspoon
Fill jars, leaving 1/2 inch of headspace, with water
Wipe rims to remove debris, and screw down lids and rings
Prepare pressure canner according to your canner’s instructions
Place jars in canner so that they are not touching one another, and lock on lid
Open steam valve, and heat over medium-high heat until steam escapes in a steady stream
Let steam escape for 10 minutes, then close valve
Bring canner to ten pounds of pressure, and process pints for 55 minutes, or quarts for 85 minutes
Remove canner from heat, and let pressure dissipate naturally
After pressure has returned to zero, you may open the stream valve, and then the lid. I recommend leaving the lid closed until the jars are well cooled, to avoid any sudden temperature changes and breakage. But if you need to get the jars out of your canner, go ahead and remove the jars, using a towel to shield them and yourself. Set in an out of the way place to cool, covering with a towel in case of drafts, etc.
After 24 hours, check for seal, wash jars if needed, and store in a cool place, out of direct light.