Jor-El gets to star in the lead story in Action 223 (Dec. 56), by Hamilton, Boring and Kaye.
Superman goes hunting in space for remnants of Krypton, and finds some good chunks that contain his father’s lab and journal. At this point, the notion that the planet turned to kryptonite upon exploding has clearly not been solidified, as Superman has no trouble in the ruins.
The rest of the story is Jor-El’s journal, and we see the scientist discover the impending destruction of his world.
Jor-El picks Earth as the destination for his escape rocket, after re-creating its gravity in a valley, and discovering that it will endow Kryptonians with super-powers. The idea that sunlight is the key to the powers has not yet been introduced.
Jor-El even gets to use these powers to fight crime and protect the Earth, preventing some Kryptonian thieves from stealing his rocket plans to invade Earth.
Lara is completely side-lined in this story, just hovering around as Jor-El sends his son to safety at the climax of the tale.
This was the first story to feature Jor-El and life on Krypton, but it would spawn many more.