I find that often reading a scientist&#x27;s dissertation will often tell you something about how they approach the rest of their research. Somewhere I actually have a paper copy of Feynman&#x27;s Thesis under Wheeler, which covers exactly this material. He was clearly enamored of Lagrangian formulations quite early (I didn&#x27;t know that it was due to a High School teacher).<p>You can find this actual thesis on-line at CERN:
<a href="http:&#x2F;&#x2F;cds.cern.ch&#x2F;record&#x2F;101498&#x2F;files&#x2F;Thesis-1942-Feynman.pdf?version=1" rel="nofollow">http:&#x2F;&#x2F;cds.cern.ch&#x2F;record&#x2F;101498&#x2F;files&#x2F;Thesis-1942-Feynman.p...</a><p>It&#x27;s short at 74 book pages, and relatively readable.