Okay, this has been bugging me for months, and I'm hoping that someone here will know the answer.
Since late last year, I've been involved in a long ongoing reading project, reading the classic runs on all of the silver age Marvel Comics titles from start to finish. Early this year I finished reading Lee and Kirby's run on Fantastic Four, then moved on to Lee and Ditko's "Doctor Strange" stories and the Lee-Kirby and Steranko "Nick Fury, Agent of SHIELD" stories from Strange Tales. Currently I'm approaching the end of the Lee-Kirby run on The Mighty Thor.
Throughout, whenever I'm reading something drawn (or at least laid-out) by Kirby in his silver age Marvel period, I'm perplexed by a strange bit of layout that he continually uses.
Since the earliest days of silver age Marvel, Kirby typically used a three-tier layout for the majority of the pages. In the early days, there would often be three panels per tier (a nine-panel grid), or even more.
Here's an example from Fantastic Four #1.
As the various series progressed, Kirby broke the stories down into fewer and fewer panels, while keeping the three-tier format as the standard page layout. The most panels you'd typically get on the page by that point was six, all of equal size on three tiers. Here's an example from Fantastic Four #61.
But eventually even six-panel-pages became somewhat rare, with the majority of the pages being five-panels, and almost all of the five-panel pages use that same three-tiered layout, with one of the tiers being a page-width panel (so it would be 2-1-1, 1-2-1, or 1-1-2). Here's an example from The Mighty Thor #136.
(Essentially Kirby was working out a visual syntax for his comics, structures that he could use again and again. When he moved over to DC a few years later, he perfected this to an art, with his "syntax" expanding to include the layout of entire issues, nearly always with two-page spreads on pages 2 and 3, four panel grids, etc. But that's a discussion for another time.)
Okay, so what bugs me about this? Well, note that I said "usually" and "typically." When there are three tiers on a page, Kirby virtually always laid them out so that they were all the same height, each taking up one third of the page from top to bottom.
But when he didn't use a three-tier layout, and instead used a two-tier layout? Then the top tier was virtually always bigger than the bottom.
And this wasn't a late development. He did it for years. Here's an example from Fantastic Four #1 again.
And again from Fantastic Four #61
And once more from The Mighty Thor #136.
As I've said, as time went on Kirby tended to break the story into fewer panels, and the nine-panel grids of the early days were rarely seen in later years. And these three examples certainly show that progression, from a six-panel grid, to a four-panel, to a two-panel. (I'm cheating just a little bit, as the Thor example above actually came out a few months before the later Fantastic Four, but that's just because I'm too lazy to keep hunting for other visual examples.) But look at those proportions from top to bottom. They're almost identical, over the course of five years or more.
So my problem is this: Why did Kirby nearly always use unequal tiers when dividing the page into two tiers, when he used equal tiers when dividing it into three? And why was it always the top tier that was the larger?
Somebody help me please, I've got to know!