Thank Oliver Heaviside for taking a hatchet to Maxwell’s equations written in Quaternion form, reducing the math to a mere vector calculus description. Maxwell’s 20 equations in 20 variables was reduced to Heaviside’s 4 equations in 2 variables. This partial description of the elephant is only the blind man’s interpretation of encountering a trunk, a leg, an ear in isolation—what is taught today as Maxwell’s work.
https://arxiv.org/abs/math-ph/0307038
Hey! Those are my lines! I’m sure you know all we know about the entire electromagnetic spectrum comes from the 4 vector equations Heaviside transformed.
I think the only place any of those original quaternions are being studied is in the Black world, about which we only know that it may exist, but never the extent.
But if it does, then many of the otherwise crazy/impossible statements alleged to have been said by various people who were close to such things may well be true, because those statements compliment the very things things the 200 quaternions postulated.