Researches on the arseniates, phosphates, and modifications of phosphoric acid /

"Specially noteworthy on two different grounds--firstly, because in it the relations to each other of ortho-, pyro-, and metaphosphoric acids and the corresponding salts were first pointed out; and secondly, because the starting point of the idea of the basicity of acids."--Editor's pref.From Philosophical Transactions for 1833, p. 253-284.Mode of access: Internet