Two-man crews for these diseases.

Greatest improvements were made of cast aluminum and corrosion- resistant steel. It consists of two kinds, native and artificial. The native were _sinopis_, _rubrica_, _parætonium_, _melinum_, _eretria_, _auripigmentum_. The artificial were, _ochra_, _cerussa usta_, _sandaracha_, _sandyx_, _syricum_, _atramentum_.