He’s also the guy who tried to institute three new letters to the alphabet:
⟨Ↄ⟩ or ⟨ↃC⟩ for /ps/ [ps]. Modelled after ⟨X⟩ /ks/ [ks].
⟨Ⱶ⟩ for [ɨ]~[ɯ]~[ʉ]. Not a phoneme for sure; I typically analyse it as an allophone of /u/.
⟨Ⅎ⟩ for /w/ [w]~[β]. Interestingly he didn’t make a new letter for /j/, but I guess it took longer to fricativise than /w/ did.
They’re useless but show some rather interesting insights. For example, the letters were modified versions of ⟨C H F⟩ - so you don’t need to create new tools to press those letters (e.g. in wax, or to preview in charcoal something you’ll carve in stone), you can simply adapt old tools to do it. He also showed awareness of allophones in his native language, most people don’t do it at all.
He’s also the guy who tried to institute three new letters to the alphabet:
They’re useless but show some rather interesting insights. For example, the letters were modified versions of ⟨C H F⟩ - so you don’t need to create new tools to press those letters (e.g. in wax, or to preview in charcoal something you’ll carve in stone), you can simply adapt old tools to do it. He also showed awareness of allophones in his native language, most people don’t do it at all.