[B] Oxide of Manganese, 0·42.

[C] Oxide of Manganese, 0·92.

[D] Alumina, 1·02.

[E] Alumina, 0·63.

[F] Iodide of Potassium, 0·44; Sulphuret of Sodium, 3·66.

[G] Iodide of Potassium, 0·23.

[H] Iodide of Potassium, 1·68.

CHAPTER V.