Hi, I'm at the tail end of writing an essay about the Stern-Gerlach experiment and I am wondering if anyone knows of any reliable sources that discuss the historical context of the Taylor-Phipps version of the Stern-Gerlach experiment using hydrogen. All of the sources that I find use the Schrodinger equation to claim that no splitting would be expected without spin, how do they know that the Schrodinger equation was accepted as right? Were there other compelling experiments to suggest that the Schrodinger equation must be real? They make it seem like the Bohr-Sommerfeld theory had been discarded already despite it being consistent with experiment and they don't mention why. I have the original paper and they confirm the value of the Bohr magneton and that's it. Any help would be greatly appreciated.