“…Commercial calcium arsenate is a variable mixture of several arsenates of calcium and calcium hydroxide. Smith and Mur ray (13) They conelmh-d that these, samples consist of mixtures ol 3< \·ιΟ.As·/)* and 4CaO.-As 2 ()·,. The common assumption that the arsenic in commercial calcium arsenate is all present as triealcium arsenate |(*a»-(As(>i) 2 | is erroneous.…”