Pet peeve: authors who cannot tell the difference between the noun 'phosphorus' and the adjective 'phosphorous'. (And even use both indifferently. The 'paper'

Pet peeve: authors who cannot tell the difference between the noun 'phosphorus' and the adjective 'phosphorous'. (And even use both indifferently. The 'paper' goes downhill from there, but today I only want to shave off a few points.)